diff options
Diffstat (limited to 'absl')
45 files changed, 527 insertions, 225 deletions
diff --git a/absl/CMakeLists.txt b/absl/CMakeLists.txt index 3e78397c..a1b1f8d8 100644 --- a/absl/CMakeLists.txt +++ b/absl/CMakeLists.txt @@ -14,8 +14,6 @@ # limitations under the License. # - - add_subdirectory(base) add_subdirectory(algorithm) add_subdirectory(container) @@ -31,3 +29,7 @@ add_subdirectory(synchronization) add_subdirectory(time) add_subdirectory(types) add_subdirectory(utility) + +if (${ABSL_BUILD_DLL}) + absl_make_dll() +endif() diff --git a/absl/base/attributes.h b/absl/base/attributes.h index acd1c526..8f77db77 100644 --- a/absl/base/attributes.h +++ b/absl/base/attributes.h @@ -563,7 +563,19 @@ // ABSL_ATTRIBUTE_PACKED // -// Prevents the compiler from padding a structure to natural alignment +// Instructs the compiler not to use natural alignment for a tagged data +// structure, but instead to reduce its alignment to 1. This attribute can +// either be applied to members of a structure or to a structure in its +// entirety. Applying this attribute (judiciously) to a structure in its +// entirety to optimize the memory footprint of very commonly-used structs is +// fine. Do not apply this attribute to a structure in its entirety if the +// purpose is to control the offsets of the members in the structure. Instead, +// apply this attribute only to structure members that need it. +// +// When applying ABSL_ATTRIBUTE_PACKED only to specific structure members the +// natural alignment of structure members not annotated is preserved. Aligned +// member accesses are faster than non-aligned member accesses even if the +// targeted microprosessor supports non-aligned accesses. #if ABSL_HAVE_ATTRIBUTE(packed) || (defined(__GNUC__) && !defined(__clang__)) #define ABSL_ATTRIBUTE_PACKED __attribute__((__packed__)) #else diff --git a/absl/base/config.h b/absl/base/config.h index c4e8dce4..eac5d268 100644 --- a/absl/base/config.h +++ b/absl/base/config.h @@ -643,4 +643,23 @@ static_assert(ABSL_INTERNAL_INLINE_NAMESPACE_STR[0] != 'h' || #undef ABSL_INTERNAL_HAS_KEYWORD +// ABSL_DLL +// +// When building Abseil as a DLL, this macro expands to `__declspec(dllexport)` +// so we can annotate symbols appropriately as being exported. When used in +// headers consuming a DLL, this macro expands to `__declspec(dllimport)` so +// that consumers know the symbol is defined inside the DLL. In all other cases, +// the macro expands to nothing. +#if defined(_MSC_VER) +#if defined(ABSL_BUILD_DLL) +#define ABSL_DLL __declspec(dllexport) +#elif defined(ABSL_CONSUME_DLL) +#define ABSL_DLL __declspec(dllimport) +#else +#define ABSL_DLL +#endif +#else +#define ABSL_DLL +#endif // defined(_MSC_VER) + #endif // ABSL_BASE_CONFIG_H_ diff --git a/absl/base/internal/raw_logging.cc b/absl/base/internal/raw_logging.cc index d79c5486..e36eb29a 100644 --- a/absl/base/internal/raw_logging.cc +++ b/absl/base/internal/raw_logging.cc @@ -225,8 +225,9 @@ bool RawLoggingFullySupported() { #endif // !ABSL_LOW_LEVEL_WRITE_SUPPORTED } -ABSL_CONST_INIT absl::base_internal::AtomicHook<InternalLogFunction> - internal_log_function(DefaultInternalLog); +ABSL_CONST_INIT ABSL_DLL + absl::base_internal::AtomicHook<InternalLogFunction> + internal_log_function(DefaultInternalLog); void RegisterInternalLogFunction(InternalLogFunction func) { internal_log_function.Store(func); diff --git a/absl/base/internal/raw_logging.h b/absl/base/internal/raw_logging.h index cff45058..ac74f97d 100644 --- a/absl/base/internal/raw_logging.h +++ b/absl/base/internal/raw_logging.h @@ -22,9 +22,11 @@ #include <string> #include "absl/base/attributes.h" +#include "absl/base/config.h" #include "absl/base/internal/atomic_hook.h" #include "absl/base/log_severity.h" #include "absl/base/macros.h" +#include "absl/base/optimization.h" #include "absl/base/port.h" // This is similar to LOG(severity) << format..., but @@ -168,7 +170,8 @@ using InternalLogFunction = void (*)(absl::LogSeverity severity, const char* file, int line, const std::string& message); -extern base_internal::AtomicHook<InternalLogFunction> internal_log_function; +ABSL_DLL extern base_internal::AtomicHook<InternalLogFunction> + internal_log_function; void RegisterInternalLogFunction(InternalLogFunction func); diff --git a/absl/base/internal/sysinfo.cc b/absl/base/internal/sysinfo.cc index 7945322f..a0930e97 100644 --- a/absl/base/internal/sysinfo.cc +++ b/absl/base/internal/sysinfo.cc @@ -58,10 +58,6 @@ namespace absl { ABSL_NAMESPACE_BEGIN namespace base_internal { -static once_flag init_system_info_once; -static int num_cpus = 0; -static double nominal_cpu_frequency = 1.0; // 0.0 might be dangerous. - static int GetNumCPUs() { #if defined(__myriad2__) return 1; @@ -265,21 +261,27 @@ static double GetNominalCPUFrequency() { #endif -// InitializeSystemInfo() may be called before main() and before -// malloc is properly initialized, therefore this must not allocate -// memory. -static void InitializeSystemInfo() { - num_cpus = GetNumCPUs(); - nominal_cpu_frequency = GetNominalCPUFrequency(); -} +ABSL_CONST_INIT static once_flag init_num_cpus_once; +ABSL_CONST_INIT static int num_cpus = 0; +// NumCPUs() may be called before main() and before malloc is properly +// initialized, therefore this must not allocate memory. int NumCPUs() { - base_internal::LowLevelCallOnce(&init_system_info_once, InitializeSystemInfo); + base_internal::LowLevelCallOnce( + &init_num_cpus_once, []() { num_cpus = GetNumCPUs(); }); return num_cpus; } +// A default frequency of 0.0 might be dangerous if it is used in division. +ABSL_CONST_INIT static once_flag init_nominal_cpu_frequency_once; +ABSL_CONST_INIT static double nominal_cpu_frequency = 1.0; + +// NominalCPUFrequency() may be called before main() and before malloc is +// properly initialized, therefore this must not allocate memory. double NominalCPUFrequency() { - base_internal::LowLevelCallOnce(&init_system_info_once, InitializeSystemInfo); + base_internal::LowLevelCallOnce( + &init_nominal_cpu_frequency_once, + []() { nominal_cpu_frequency = GetNominalCPUFrequency(); }); return nominal_cpu_frequency; } diff --git a/absl/base/internal/thread_identity.cc b/absl/base/internal/thread_identity.cc index 6a28f246..d63a04ae 100644 --- a/absl/base/internal/thread_identity.cc +++ b/absl/base/internal/thread_identity.cc @@ -113,6 +113,18 @@ void SetCurrentThreadIdentity( #endif } +#if ABSL_THREAD_IDENTITY_MODE == ABSL_THREAD_IDENTITY_MODE_USE_TLS || \ + ABSL_THREAD_IDENTITY_MODE == ABSL_THREAD_IDENTITY_MODE_USE_CPP11 + +// Please see the comment on `CurrentThreadIdentityIfPresent` in +// thread_identity.h. Because DLLs cannot expose thread_local variables in +// headers, we opt for the correct-but-slower option of placing the definition +// of this function only in a translation unit inside DLL. +#if defined(ABSL_BUILD_DLL) || defined(ABSL_CONSUME_DLL) +ThreadIdentity* CurrentThreadIdentityIfPresent() { return thread_identity_ptr; } +#endif +#endif + void ClearCurrentThreadIdentity() { #if ABSL_THREAD_IDENTITY_MODE == ABSL_THREAD_IDENTITY_MODE_USE_TLS || \ ABSL_THREAD_IDENTITY_MODE == ABSL_THREAD_IDENTITY_MODE_USE_CPP11 diff --git a/absl/base/internal/thread_identity.h b/absl/base/internal/thread_identity.h index 5dfd0715..ceb109b4 100644 --- a/absl/base/internal/thread_identity.h +++ b/absl/base/internal/thread_identity.h @@ -30,6 +30,7 @@ #include <atomic> #include <cstdint> +#include "absl/base/config.h" #include "absl/base/internal/per_thread_tls.h" namespace absl { @@ -234,9 +235,17 @@ ABSL_CONST_INIT extern thread_local ThreadIdentity* thread_identity_ptr; #error Thread-local storage not detected on this platform #endif +// thread_local variables cannot be in headers exposed by DLLs. However, it is +// important for performance reasons in general that +// `CurrentThreadIdentityIfPresent` be inlined. This is not possible across a +// DLL boundary so, with DLLs, we opt to have the function not be inlined. Note +// that `CurrentThreadIdentityIfPresent` is declared above so we can exclude +// this entire inline definition when compiling as a DLL. +#if !defined(ABSL_BUILD_DLL) && !defined(ABSL_CONSUME_DLL) inline ThreadIdentity* CurrentThreadIdentityIfPresent() { return thread_identity_ptr; } +#endif #elif ABSL_THREAD_IDENTITY_MODE != \ ABSL_THREAD_IDENTITY_MODE_USE_POSIX_SETSPECIFIC diff --git a/absl/base/options.h b/absl/base/options.h index 592b33b7..6868c77b 100644 --- a/absl/base/options.h +++ b/absl/base/options.h @@ -66,7 +66,13 @@ // NOTE: the defaults within this file all assume that Abseil can select the // proper Abseil implementation at compile-time, which will not be sufficient // to guarantee ABI stability to package managers. -// + +// Include a standard library header to allow configuration based on the +// standard library in use. +#ifdef __cplusplus +#include <ciso646> +#endif + // ----------------------------------------------------------------------------- // Type Compatibility Options // ----------------------------------------------------------------------------- @@ -158,7 +164,6 @@ #define ABSL_OPTION_USE_STD_STRING_VIEW 2 - // ABSL_OPTION_USE_STD_VARIANT // // This option controls whether absl::variant is implemented as an alias to diff --git a/absl/container/btree_map.h b/absl/container/btree_map.h index cbfcb58c..d23f4ee5 100644 --- a/absl/container/btree_map.h +++ b/absl/container/btree_map.h @@ -226,6 +226,30 @@ class btree_map // Inserts the elements within the initializer list `ilist`. using Base::insert; + // btree_map::insert_or_assign() + // + // Inserts an element of the specified value into the `btree_map` provided + // that a value with the given key does not already exist, or replaces the + // corresponding mapped type with the forwarded `obj` argument if a key for + // that value already exists, returning an iterator pointing to the newly + // inserted element. Overloads are listed below. + // + // pair<iterator, bool> insert_or_assign(const key_type& k, M&& obj): + // pair<iterator, bool> insert_or_assign(key_type&& k, M&& obj): + // + // Inserts/Assigns (or moves) the element of the specified key into the + // `btree_map`. If the returned bool is true, insertion took place, and if + // it's false, assignment took place. + // + // iterator insert_or_assign(const_iterator hint, + // const key_type& k, M&& obj): + // iterator insert_or_assign(const_iterator hint, key_type&& k, M&& obj): + // + // Inserts/Assigns (or moves) the element of the specified key into the + // `btree_map` using the position of `hint` as a non-binding suggestion + // for where to begin the insertion search. + using Base::insert_or_assign; + // btree_map::emplace() // // Inserts an element of the specified value by constructing it in-place diff --git a/absl/container/btree_test.cc b/absl/container/btree_test.cc index 8692b9c2..af8ee00b 100644 --- a/absl/container/btree_test.cc +++ b/absl/container/btree_test.cc @@ -2345,6 +2345,65 @@ TEST(Btree, EraseIf) { } } +TEST(Btree, InsertOrAssign) { + absl::btree_map<int, int> m = {{1, 1}, {3, 3}}; + using value_type = typename decltype(m)::value_type; + + auto ret = m.insert_or_assign(4, 4); + EXPECT_EQ(*ret.first, value_type(4, 4)); + EXPECT_TRUE(ret.second); + ret = m.insert_or_assign(3, 100); + EXPECT_EQ(*ret.first, value_type(3, 100)); + EXPECT_FALSE(ret.second); + + auto hint_ret = m.insert_or_assign(ret.first, 3, 200); + EXPECT_EQ(*hint_ret, value_type(3, 200)); + hint_ret = m.insert_or_assign(m.find(1), 0, 1); + EXPECT_EQ(*hint_ret, value_type(0, 1)); + // Test with bad hint. + hint_ret = m.insert_or_assign(m.end(), -1, 1); + EXPECT_EQ(*hint_ret, value_type(-1, 1)); + + EXPECT_THAT(m, ElementsAre(Pair(-1, 1), Pair(0, 1), Pair(1, 1), Pair(3, 200), + Pair(4, 4))); +} + +TEST(Btree, InsertOrAssignMovableOnly) { + absl::btree_map<int, MovableOnlyInstance> m; + using value_type = typename decltype(m)::value_type; + + auto ret = m.insert_or_assign(4, MovableOnlyInstance(4)); + EXPECT_EQ(*ret.first, value_type(4, MovableOnlyInstance(4))); + EXPECT_TRUE(ret.second); + ret = m.insert_or_assign(4, MovableOnlyInstance(100)); + EXPECT_EQ(*ret.first, value_type(4, MovableOnlyInstance(100))); + EXPECT_FALSE(ret.second); + + auto hint_ret = m.insert_or_assign(ret.first, 3, MovableOnlyInstance(200)); + EXPECT_EQ(*hint_ret, value_type(3, MovableOnlyInstance(200))); + + EXPECT_EQ(m.size(), 2); +} + +TEST(Btree, BitfieldArgument) { + union { + int n : 1; + }; + n = 0; + absl::btree_map<int, int> m; + m.erase(n); + m.count(n); + m.find(n); + m.contains(n); + m.equal_range(n); + m.insert_or_assign(n, n); + m.insert_or_assign(m.end(), n, n); + m.try_emplace(n); + m.try_emplace(m.end(), n); + m.at(n); + m[n]; +} + } // namespace } // namespace container_internal ABSL_NAMESPACE_END diff --git a/absl/container/internal/btree_container.h b/absl/container/internal/btree_container.h index 04795c2e..3e6ff4b8 100644 --- a/absl/container/internal/btree_container.h +++ b/absl/container/internal/btree_container.h @@ -372,7 +372,7 @@ class btree_map_container : public btree_set_container<Tree> { using super_type = btree_set_container<Tree>; using params_type = typename Tree::params_type; - protected: + private: template <class K> using key_arg = typename super_type::template key_arg<K>; @@ -390,6 +390,69 @@ class btree_map_container : public btree_set_container<Tree> { btree_map_container() {} // Insertion routines. + // Note: the nullptr template arguments and extra `const M&` overloads allow + // for supporting bitfield arguments. + // Note: when we call `std::forward<M>(obj)` twice, it's safe because + // insert_unique/insert_hint_unique are guaranteed to not consume `obj` when + // `ret.second` is false. + template <class M> + std::pair<iterator, bool> insert_or_assign(const key_type &k, const M &obj) { + const std::pair<iterator, bool> ret = this->tree_.insert_unique(k, k, obj); + if (!ret.second) ret.first->second = obj; + return ret; + } + template <class M, key_type * = nullptr> + std::pair<iterator, bool> insert_or_assign(key_type &&k, const M &obj) { + const std::pair<iterator, bool> ret = + this->tree_.insert_unique(k, std::move(k), obj); + if (!ret.second) ret.first->second = obj; + return ret; + } + template <class M, M * = nullptr> + std::pair<iterator, bool> insert_or_assign(const key_type &k, M &&obj) { + const std::pair<iterator, bool> ret = + this->tree_.insert_unique(k, k, std::forward<M>(obj)); + if (!ret.second) ret.first->second = std::forward<M>(obj); + return ret; + } + template <class M, key_type * = nullptr, M * = nullptr> + std::pair<iterator, bool> insert_or_assign(key_type &&k, M &&obj) { + const std::pair<iterator, bool> ret = + this->tree_.insert_unique(k, std::move(k), std::forward<M>(obj)); + if (!ret.second) ret.first->second = std::forward<M>(obj); + return ret; + } + template <class M> + iterator insert_or_assign(const_iterator position, const key_type &k, + const M &obj) { + const std::pair<iterator, bool> ret = + this->tree_.insert_hint_unique(iterator(position), k, k, obj); + if (!ret.second) ret.first->second = obj; + return ret.first; + } + template <class M, key_type * = nullptr> + iterator insert_or_assign(const_iterator position, key_type &&k, + const M &obj) { + const std::pair<iterator, bool> ret = this->tree_.insert_hint_unique( + iterator(position), k, std::move(k), obj); + if (!ret.second) ret.first->second = obj; + return ret.first; + } + template <class M, M * = nullptr> + iterator insert_or_assign(const_iterator position, const key_type &k, + M &&obj) { + const std::pair<iterator, bool> ret = this->tree_.insert_hint_unique( + iterator(position), k, k, std::forward<M>(obj)); + if (!ret.second) ret.first->second = std::forward<M>(obj); + return ret.first; + } + template <class M, key_type * = nullptr, M * = nullptr> + iterator insert_or_assign(const_iterator position, key_type &&k, M &&obj) { + const std::pair<iterator, bool> ret = this->tree_.insert_hint_unique( + iterator(position), k, std::move(k), std::forward<M>(obj)); + if (!ret.second) ret.first->second = std::forward<M>(obj); + return ret.first; + } template <typename... Args> std::pair<iterator, bool> try_emplace(const key_type &k, Args &&... args) { return this->tree_.insert_unique( diff --git a/absl/container/internal/hashtablez_sampler.cc b/absl/container/internal/hashtablez_sampler.cc index e15f4444..56447251 100644 --- a/absl/container/internal/hashtablez_sampler.cc +++ b/absl/container/internal/hashtablez_sampler.cc @@ -39,17 +39,16 @@ ABSL_CONST_INIT std::atomic<bool> g_hashtablez_enabled{ ABSL_CONST_INIT std::atomic<int32_t> g_hashtablez_sample_parameter{1 << 10}; ABSL_CONST_INIT std::atomic<int32_t> g_hashtablez_max_samples{1 << 20}; -#if ABSL_PER_THREAD_TLS == 1 +#if defined(ABSL_INTERNAL_HASHTABLEZ_SAMPLE) ABSL_PER_THREAD_TLS_KEYWORD absl::base_internal::ExponentialBiased g_exponential_biased_generator; #endif } // namespace -#if ABSL_PER_THREAD_TLS == 1 +#if defined(ABSL_INTERNAL_HASHTABLEZ_SAMPLE) ABSL_PER_THREAD_TLS_KEYWORD int64_t global_next_sample = 0; -#endif // ABSL_PER_THREAD_TLS == 1 - +#endif // defined(ABSL_INTERNAL_HASHTABLEZ_SAMPLE) HashtablezSampler& HashtablezSampler::Global() { static auto* sampler = new HashtablezSampler(); @@ -192,7 +191,7 @@ HashtablezInfo* SampleSlow(int64_t* next_sample) { return HashtablezSampler::Global().Register(); } -#if ABSL_PER_THREAD_TLS == 0 +#if !defined(ABSL_INTERNAL_HASHTABLEZ_SAMPLE) *next_sample = std::numeric_limits<int64_t>::max(); return nullptr; #else diff --git a/absl/container/internal/hashtablez_sampler.h b/absl/container/internal/hashtablez_sampler.h index c4f9629f..34d5e572 100644 --- a/absl/container/internal/hashtablez_sampler.h +++ b/absl/container/internal/hashtablez_sampler.h @@ -180,14 +180,23 @@ class HashtablezInfoHandle { HashtablezInfo* info_; }; -#if ABSL_PER_THREAD_TLS == 1 +#if defined(ABSL_INTERNAL_HASHTABLEZ_SAMPLE) +#error ABSL_INTERNAL_HASHTABLEZ_SAMPLE cannot be directly set +#endif // defined(ABSL_INTERNAL_HASHTABLEZ_SAMPLE) + +#if (ABSL_PER_THREAD_TLS == 1) && !defined(ABSL_BUILD_DLL) && \ + !defined(ABSL_CONSUME_DLL) +#define ABSL_INTERNAL_HASHTABLEZ_SAMPLE +#endif + +#if defined(ABSL_INTERNAL_HASHTABLEZ_SAMPLE) extern ABSL_PER_THREAD_TLS_KEYWORD int64_t global_next_sample; #endif // ABSL_PER_THREAD_TLS // Returns an RAII sampling handle that manages registration and unregistation // with the global sampler. inline HashtablezInfoHandle Sample() { -#if ABSL_PER_THREAD_TLS == 1 +#if defined(ABSL_INTERNAL_HASHTABLEZ_SAMPLE) if (ABSL_PREDICT_TRUE(--global_next_sample > 0)) { return HashtablezInfoHandle(nullptr); } diff --git a/absl/container/internal/hashtablez_sampler_test.cc b/absl/container/internal/hashtablez_sampler_test.cc index 102b2375..36f5ccdd 100644 --- a/absl/container/internal/hashtablez_sampler_test.cc +++ b/absl/container/internal/hashtablez_sampler_test.cc @@ -169,7 +169,7 @@ TEST(HashtablezInfoTest, RecordRehash) { EXPECT_EQ(info.num_erases.load(), 0); } -#if ABSL_PER_THREAD_TLS == 1 +#if defined(ABSL_HASHTABLEZ_SAMPLE) TEST(HashtablezSamplerTest, SmallSampleParameter) { SetHashtablezEnabled(true); SetHashtablezSampleParameter(100); diff --git a/absl/container/internal/raw_hash_set_test.cc b/absl/container/internal/raw_hash_set_test.cc index 38e5e0e8..a96ae68a 100644 --- a/absl/container/internal/raw_hash_set_test.cc +++ b/absl/container/internal/raw_hash_set_test.cc @@ -418,53 +418,6 @@ TEST(Table, Empty) { EXPECT_TRUE(t.empty()); } -#ifdef __GNUC__ -template <class T> -ABSL_ATTRIBUTE_ALWAYS_INLINE inline void DoNotOptimize(const T& v) { - asm volatile("" : : "r,m"(v) : "memory"); -} -#endif - -TEST(Table, Prefetch) { - IntTable t; - t.emplace(1); - // Works for both present and absent keys. - t.prefetch(1); - t.prefetch(2); - - // Do not run in debug mode, when prefetch is not implemented, or when - // sanitizers are enabled, or on WebAssembly. -#if defined(NDEBUG) && defined(__GNUC__) && defined(__x86_64__) && \ - !defined(ADDRESS_SANITIZER) && !defined(MEMORY_SANITIZER) && \ - !defined(THREAD_SANITIZER) && !defined(UNDEFINED_BEHAVIOR_SANITIZER) && \ - !defined(__EMSCRIPTEN__) - const auto now = [] { return absl::base_internal::CycleClock::Now(); }; - - // Make size enough to not fit in L2 cache (16.7 Mb) - static constexpr int size = 1 << 22; - for (int i = 0; i < size; ++i) t.insert(i); - - int64_t no_prefetch = 0, prefetch = 0; - for (int iter = 0; iter < 10; ++iter) { - int64_t time = now(); - for (int i = 0; i < size; ++i) { - DoNotOptimize(t.find(i)); - } - no_prefetch += now() - time; - - time = now(); - for (int i = 0; i < size; ++i) { - t.prefetch(i + 20); - DoNotOptimize(t.find(i)); - } - prefetch += now() - time; - } - - // no_prefetch is at least 30% slower. - EXPECT_GE(1.0 * no_prefetch / prefetch, 1.3); -#endif -} - TEST(Table, LookupEmpty) { IntTable t; auto it = t.find(0); @@ -1842,7 +1795,7 @@ TEST(TableDeathTest, EraseOfEndAsserts) { EXPECT_DEATH_IF_SUPPORTED(t.erase(t.end()), kDeathMsg); } -#if ABSL_PER_THREAD_TLS == 1 +#if defined(ABSL_HASHTABLEZ_SAMPLE) TEST(RawHashSamplerTest, Sample) { // Enable the feature even if the prod default is off. SetHashtablezEnabled(true); @@ -1863,7 +1816,7 @@ TEST(RawHashSamplerTest, Sample) { EXPECT_NEAR((end_size - start_size) / static_cast<double>(tables.size()), 0.01, 0.005); } -#endif +#endif // ABSL_HASHTABLEZ_SAMPLER TEST(RawHashSamplerTest, DoNotSampleCustomAllocators) { // Enable the feature even if the prod default is off. diff --git a/absl/copts/AbseilConfigureCopts.cmake b/absl/copts/AbseilConfigureCopts.cmake index 7543928a..77d4ace8 100644 --- a/absl/copts/AbseilConfigureCopts.cmake +++ b/absl/copts/AbseilConfigureCopts.cmake @@ -5,6 +5,13 @@ set(ABSL_LSAN_LINKOPTS "") set(ABSL_HAVE_LSAN OFF) set(ABSL_DEFAULT_LINKOPTS "") +if (BUILD_SHARED_LIBS AND MSVC) + set(ABSL_BUILD_DLL TRUE) + set(CMAKE_WINDOWS_EXPORT_ALL_SYMBOLS ON) +else() + set(ABSL_BUILD_DLL FALSE) +endif() + if("${CMAKE_SYSTEM_PROCESSOR}" STREQUAL "x86_64" OR "${CMAKE_SYSTEM_PROCESSOR}" STREQUAL "AMD64") if (MSVC) set(ABSL_RANDOM_RANDEN_COPTS "${ABSL_RANDOM_HWAES_MSVC_X64_FLAGS}") diff --git a/absl/debugging/symbolize_test.cc b/absl/debugging/symbolize_test.cc index 0bac60b9..a1d03aab 100644 --- a/absl/debugging/symbolize_test.cc +++ b/absl/debugging/symbolize_test.cc @@ -473,6 +473,7 @@ void ABSL_ATTRIBUTE_NOINLINE TestWithReturnAddress() { } #elif defined(_WIN32) +#if !defined(ABSL_CONSUME_DLL) TEST(Symbolize, Basics) { EXPECT_STREQ("nonstatic_func", TrySymbolize((void *)(&nonstatic_func))); @@ -511,6 +512,7 @@ TEST(Symbolize, SymbolizeWithDemangling) { EXPECT_TRUE(strstr(result, "Foo::func") != nullptr) << result; } +#endif // !defined(ABSL_CONSUME_DLL) #else // Symbolizer unimplemented TEST(Symbolize, Unimplemented) { diff --git a/absl/flags/BUILD.bazel b/absl/flags/BUILD.bazel index 6c7b2b6e..cbdbae52 100644 --- a/absl/flags/BUILD.bazel +++ b/absl/flags/BUILD.bazel @@ -324,6 +324,23 @@ cc_test( ], ) +cc_binary( + name = "flag_benchmark", + testonly = 1, + srcs = [ + "flag_benchmark.cc", + ], + copts = ABSL_TEST_COPTS, + tags = ["benchmark"], + visibility = ["//visibility:private"], + deps = [ + ":flag", + "//absl/time", + "//absl/types:optional", + "@com_github_google_benchmark//:benchmark_main", + ], +) + cc_test( name = "marshalling_test", size = "small", diff --git a/absl/flags/flag.cc b/absl/flags/flag.cc index 9af80079..e67f7304 100644 --- a/absl/flags/flag.cc +++ b/absl/flags/flag.cc @@ -22,7 +22,14 @@ namespace absl { ABSL_NAMESPACE_BEGIN -// This global nutex protects on-demand construction of flag objects in MSVC +#ifndef NDEBUG +#define ABSL_FLAGS_GET(T) \ + T GetFlag(const absl::Flag<T>& flag) { return flag.Get(); } +ABSL_FLAGS_INTERNAL_BUILTIN_TYPES(ABSL_FLAGS_GET) +#undef ABSL_FLAGS_GET +#endif + +// This global mutex protects on-demand construction of flag objects in MSVC // builds. #if defined(_MSC_VER) && !defined(__clang__) diff --git a/absl/flags/flag.h b/absl/flags/flag.h index cc22cdb9..bd61668f 100644 --- a/absl/flags/flag.h +++ b/absl/flags/flag.h @@ -186,25 +186,29 @@ class Flag { // // // FLAGS_firstname is a Flag of type `std::string` // std::string first_name = absl::GetFlag(FLAGS_firstname); -template <typename T, - typename std::enable_if< - !flags_internal::IsAtomicFlagTypeTrait<T>::value, int>::type = 0> -ABSL_MUST_USE_RESULT T GetFlag(const absl::Flag<T>& flag) { - return flag.Get(); -} - +#ifndef NDEBUG // We want to validate the type mismatch between type definition and // declaration. The lock-free implementation does not allow us to do it, // so in debug builds we always use the slower implementation, which always // validates the type. -#ifndef NDEBUG +template <typename T> +ABSL_MUST_USE_RESULT T GetFlag(const absl::Flag<T>& flag) { + return flag.Get(); +} +// We currently need an external linkage for built-in types because shared +// libraries have different addresses of flags_internal::FlagOps<T> which +// might cause log spam when checking the same flag type. +#define ABSL_FLAGS_INTERNAL_BUILT_IN_EXPORT(T) \ + ABSL_MUST_USE_RESULT T GetFlag(const absl::Flag<T>& flag); +ABSL_FLAGS_INTERNAL_BUILTIN_TYPES(ABSL_FLAGS_INTERNAL_BUILT_IN_EXPORT) +#undef ABSL_FLAGS_INTERNAL_BUILT_IN_EXPORT +#else template <typename T, typename std::enable_if< - flags_internal::IsAtomicFlagTypeTrait<T>::value, int>::type = 0> + !flags_internal::IsAtomicFlagTypeTrait<T>::value, int>::type = 0> ABSL_MUST_USE_RESULT T GetFlag(const absl::Flag<T>& flag) { return flag.Get(); } -#else // Overload for `GetFlag()` for types that support lock-free reads. template <typename T, typename std::enable_if< diff --git a/absl/flags/flag_benchmark.cc b/absl/flags/flag_benchmark.cc new file mode 100644 index 00000000..87f73170 --- /dev/null +++ b/absl/flags/flag_benchmark.cc @@ -0,0 +1,111 @@ +// +// Copyright 2020 The Abseil Authors. +// +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// https://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +#include "absl/flags/flag.h" +#include "absl/time/time.h" +#include "absl/types/optional.h" +#include "benchmark/benchmark.h" + +namespace { +using String = std::string; +using VectorOfStrings = std::vector<std::string>; +using AbslDuration = absl::Duration; + +// We do not want to take over marshalling for the types absl::optional<int>, +// absl::optional<std::string> which we do not own. Instead we introduce unique +// "aliases" to these types, which we do. +using AbslOptionalInt = absl::optional<int>; +struct OptionalInt : AbslOptionalInt { + using AbslOptionalInt::AbslOptionalInt; +}; +// Next two functions represent Abseil Flags marshalling for OptionalInt. +bool AbslParseFlag(absl::string_view src, OptionalInt* flag, + std::string* error) { + int val; + if (src.empty()) + flag->reset(); + else if (!absl::ParseFlag(src, &val, error)) + return false; + *flag = val; + return true; +} +std::string AbslUnparseFlag(const OptionalInt& flag) { + return !flag ? "" : absl::UnparseFlag(*flag); +} + +using AbslOptionalString = absl::optional<std::string>; +struct OptionalString : AbslOptionalString { + using AbslOptionalString::AbslOptionalString; +}; +// Next two functions represent Abseil Flags marshalling for OptionalString. +bool AbslParseFlag(absl::string_view src, OptionalString* flag, + std::string* error) { + std::string val; + if (src.empty()) + flag->reset(); + else if (!absl::ParseFlag(src, &val, error)) + return false; + *flag = val; + return true; +} +std::string AbslUnparseFlag(const OptionalString& flag) { + return !flag ? "" : absl::UnparseFlag(*flag); +} + +struct UDT { + UDT() = default; + UDT(const UDT&) {} + UDT& operator=(const UDT&) { return *this; } +}; +// Next two functions represent Abseil Flags marshalling for UDT. +bool AbslParseFlag(absl::string_view, UDT*, std::string*) { return true; } +std::string AbslUnparseFlag(const UDT&) { return ""; } + +} // namespace + +#define BENCHMARKED_TYPES(A) \ + A(bool) \ + A(int16_t) \ + A(uint16_t) \ + A(int32_t) \ + A(uint32_t) \ + A(int64_t) \ + A(uint64_t) \ + A(double) \ + A(float) \ + A(String) \ + A(VectorOfStrings) \ + A(OptionalInt) \ + A(OptionalString) \ + A(AbslDuration) \ + A(UDT) + +#define FLAG_DEF(T) ABSL_FLAG(T, T##_flag, {}, ""); + +BENCHMARKED_TYPES(FLAG_DEF) + +namespace { + +#define BM_GetFlag(T) \ + void BM_GetFlag_##T(benchmark::State& state) { \ + for (auto _ : state) { \ + benchmark::DoNotOptimize(absl::GetFlag(FLAGS_##T##_flag)); \ + } \ + } \ + BENCHMARK(BM_GetFlag_##T); + +BENCHMARKED_TYPES(BM_GetFlag) + +} // namespace diff --git a/absl/hash/internal/hash.h b/absl/hash/internal/hash.h index 8639181f..ae7a60cd 100644 --- a/absl/hash/internal/hash.h +++ b/absl/hash/internal/hash.h @@ -708,7 +708,8 @@ struct is_hashable : std::integral_constant<bool, HashSelect::template Apply<T>::value> {}; // CityHashState -class CityHashState : public HashStateBase<CityHashState> { +class ABSL_DLL CityHashState + : public HashStateBase<CityHashState> { // absl::uint128 is not an alias or a thin wrapper around the intrinsic. // We use the intrinsic when available to improve performance. #ifdef ABSL_HAVE_INTRINSIC_INT128 diff --git a/absl/numeric/int128.cc b/absl/numeric/int128.cc index a20a77e7..b605a870 100644 --- a/absl/numeric/int128.cc +++ b/absl/numeric/int128.cc @@ -25,8 +25,8 @@ namespace absl { ABSL_NAMESPACE_BEGIN -const uint128 kuint128max = MakeUint128(std::numeric_limits<uint64_t>::max(), - std::numeric_limits<uint64_t>::max()); +ABSL_DLL const uint128 kuint128max = MakeUint128( + std::numeric_limits<uint64_t>::max(), std::numeric_limits<uint64_t>::max()); namespace { diff --git a/absl/numeric/int128.h b/absl/numeric/int128.h index 718f70b1..636e3a5b 100644 --- a/absl/numeric/int128.h +++ b/absl/numeric/int128.h @@ -234,7 +234,7 @@ class // Prefer to use the constexpr `Uint128Max()`. // // TODO(absl-team) deprecate kuint128max once migration tool is released. -extern const uint128 kuint128max; +ABSL_DLL extern const uint128 kuint128max; // allow uint128 to be logged std::ostream& operator<<(std::ostream& os, uint128 v); diff --git a/absl/random/BUILD.bazel b/absl/random/BUILD.bazel index 2585b397..f78fbc7e 100644 --- a/absl/random/BUILD.bazel +++ b/absl/random/BUILD.bazel @@ -67,6 +67,7 @@ cc_library( linkopts = ABSL_DEFAULT_LINKOPTS, deps = [ "//absl/base:base_internal", + "//absl/base:config", "//absl/base:core_headers", "//absl/meta:type_traits", "//absl/random/internal:distributions", @@ -183,6 +184,7 @@ cc_test( timeout = "eternal", # Android can take a very long time srcs = ["beta_distribution_test.cc"], copts = ABSL_TEST_COPTS, + flaky = 1, linkopts = ABSL_DEFAULT_LINKOPTS, deps = [ ":distributions", diff --git a/absl/random/CMakeLists.txt b/absl/random/CMakeLists.txt index 46dbc3ef..efa55d8f 100644 --- a/absl/random/CMakeLists.txt +++ b/absl/random/CMakeLists.txt @@ -183,6 +183,7 @@ absl_cc_library( ${ABSL_DEFAULT_LINKOPTS} DEPS absl::base_internal + absl::config absl::core_headers absl::random_internal_generate_real absl::random_internal_distributions diff --git a/absl/random/gaussian_distribution.h b/absl/random/gaussian_distribution.h index c1427b06..4b07a5c0 100644 --- a/absl/random/gaussian_distribution.h +++ b/absl/random/gaussian_distribution.h @@ -28,6 +28,7 @@ #include <limits> #include <type_traits> +#include "absl/base/config.h" #include "absl/random/internal/fast_uniform_bits.h" #include "absl/random/internal/generate_real.h" #include "absl/random/internal/iostream_state_saver.h" @@ -43,7 +44,7 @@ namespace random_internal { // The specific algorithm has some of the improvements suggested by the // 2005 paper, "An Improved Ziggurat Method to Generate Normal Random Samples", // Jurgen A Doornik. (https://www.doornik.com/research/ziggurat.pdf) -class gaussian_distribution_base { +class ABSL_DLL gaussian_distribution_base { public: template <typename URBG> inline double zignor(URBG& g); // NOLINT(runtime/references) diff --git a/absl/strings/BUILD.bazel b/absl/strings/BUILD.bazel index dc7e1bfd..d5a362d0 100644 --- a/absl/strings/BUILD.bazel +++ b/absl/strings/BUILD.bazel @@ -37,7 +37,6 @@ cc_library( "internal/charconv_bigint.h", "internal/charconv_parse.cc", "internal/charconv_parse.h", - "internal/escaping.cc", "internal/memutil.cc", "internal/memutil.h", "internal/stl_type_traits.h", @@ -55,7 +54,6 @@ cc_library( "ascii.h", "charconv.h", "escaping.h", - "internal/escaping.h", "match.h", "numbers.h", "str_cat.h", @@ -85,11 +83,13 @@ cc_library( cc_library( name = "internal", srcs = [ + "internal/escaping.cc", "internal/ostringstream.cc", "internal/utf8.cc", ], hdrs = [ "internal/char_map.h", + "internal/escaping.h", "internal/ostringstream.h", "internal/resize_uninitialized.h", "internal/utf8.h", @@ -99,6 +99,7 @@ cc_library( "//absl/base:config", "//absl/base:core_headers", "//absl/base:endian", + "//absl/base:raw_logging_internal", "//absl/meta:type_traits", ], ) diff --git a/absl/strings/CMakeLists.txt b/absl/strings/CMakeLists.txt index 36702f71..3feb5e94 100644 --- a/absl/strings/CMakeLists.txt +++ b/absl/strings/CMakeLists.txt @@ -38,8 +38,6 @@ absl_cc_library( "internal/charconv_bigint.h" "internal/charconv_parse.cc" "internal/charconv_parse.h" - "internal/escaping.cc" - "internal/escaping.h" "internal/memutil.cc" "internal/memutil.h" "internal/stl_type_traits.h" @@ -74,6 +72,8 @@ absl_cc_library( strings_internal HDRS "internal/char_map.h" + "internal/escaping.cc" + "internal/escaping.h" "internal/ostringstream.h" "internal/resize_uninitialized.h" "internal/utf8.h" @@ -86,6 +86,7 @@ absl_cc_library( absl::config absl::core_headers absl::endian + absl::raw_logging_internal absl::type_traits ) diff --git a/absl/strings/ascii.cc b/absl/strings/ascii.cc index abea3e4f..93bb03e9 100644 --- a/absl/strings/ascii.cc +++ b/absl/strings/ascii.cc @@ -57,7 +57,7 @@ namespace ascii_internal { // of these bits is tightly coupled to this implementation, the individual bits // are not named. Note that bitfields for all characters above ASCII 127 are // zero-initialized. -const unsigned char kPropertyBits[256] = { +ABSL_DLL const unsigned char kPropertyBits[256] = { 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, // 0x00 0x40, 0x68, 0x48, 0x48, 0x48, 0x48, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, // 0x10 @@ -79,7 +79,7 @@ const unsigned char kPropertyBits[256] = { // Array of characters for the ascii_tolower() function. For values 'A' // through 'Z', return the lower-case character; otherwise, return the // identity of the passed character. -const char kToLower[256] = { +ABSL_DLL const char kToLower[256] = { '\x00', '\x01', '\x02', '\x03', '\x04', '\x05', '\x06', '\x07', '\x08', '\x09', '\x0a', '\x0b', '\x0c', '\x0d', '\x0e', '\x0f', '\x10', '\x11', '\x12', '\x13', '\x14', '\x15', '\x16', '\x17', @@ -117,7 +117,7 @@ const char kToLower[256] = { // Array of characters for the ascii_toupper() function. For values 'a' // through 'z', return the upper-case character; otherwise, return the // identity of the passed character. -const char kToUpper[256] = { +ABSL_DLL const char kToUpper[256] = { '\x00', '\x01', '\x02', '\x03', '\x04', '\x05', '\x06', '\x07', '\x08', '\x09', '\x0a', '\x0b', '\x0c', '\x0d', '\x0e', '\x0f', '\x10', '\x11', '\x12', '\x13', '\x14', '\x15', '\x16', '\x17', diff --git a/absl/strings/ascii.h b/absl/strings/ascii.h index 792aabe5..b46bc71f 100644 --- a/absl/strings/ascii.h +++ b/absl/strings/ascii.h @@ -56,6 +56,7 @@ #include <string> #include "absl/base/attributes.h" +#include "absl/base/config.h" #include "absl/strings/string_view.h" namespace absl { @@ -63,13 +64,13 @@ ABSL_NAMESPACE_BEGIN namespace ascii_internal { // Declaration for an array of bitfields holding character information. -extern const unsigned char kPropertyBits[256]; +ABSL_DLL extern const unsigned char kPropertyBits[256]; // Declaration for the array of characters to upper-case characters. -extern const char kToUpper[256]; +ABSL_DLL extern const char kToUpper[256]; // Declaration for the array of characters to lower-case characters. -extern const char kToLower[256]; +ABSL_DLL extern const char kToLower[256]; } // namespace ascii_internal diff --git a/absl/strings/internal/charconv_bigint.cc b/absl/strings/internal/charconv_bigint.cc index 860c27b2..66f33e72 100644 --- a/absl/strings/internal/charconv_bigint.cc +++ b/absl/strings/internal/charconv_bigint.cc @@ -158,12 +158,12 @@ const uint32_t* LargePowerOfFiveData(int i) { int LargePowerOfFiveSize(int i) { return 2 * i; } } // namespace -const uint32_t kFiveToNth[14] = { +ABSL_DLL const uint32_t kFiveToNth[14] = { 1, 5, 25, 125, 625, 3125, 15625, 78125, 390625, 1953125, 9765625, 48828125, 244140625, 1220703125, }; -const uint32_t kTenToNth[10] = { +ABSL_DLL const uint32_t kTenToNth[10] = { 1, 10, 100, 1000, 10000, 100000, 1000000, 10000000, 100000000, 1000000000, }; diff --git a/absl/strings/internal/charconv_bigint.h b/absl/strings/internal/charconv_bigint.h index 108e1eb2..999e9ae3 100644 --- a/absl/strings/internal/charconv_bigint.h +++ b/absl/strings/internal/charconv_bigint.h @@ -20,6 +20,7 @@ #include <iostream> #include <string> +#include "absl/base/config.h" #include "absl/strings/ascii.h" #include "absl/strings/internal/charconv_parse.h" #include "absl/strings/string_view.h" @@ -33,8 +34,9 @@ constexpr int kMaxSmallPowerOfFive = 13; // The largest power that 10 that can be raised to, and still fit in a uint32_t. constexpr int kMaxSmallPowerOfTen = 9; -extern const uint32_t kFiveToNth[kMaxSmallPowerOfFive + 1]; -extern const uint32_t kTenToNth[kMaxSmallPowerOfTen + 1]; +ABSL_DLL extern const uint32_t + kFiveToNth[kMaxSmallPowerOfFive + 1]; +ABSL_DLL extern const uint32_t kTenToNth[kMaxSmallPowerOfTen + 1]; // Large, fixed-width unsigned integer. // diff --git a/absl/strings/internal/str_format/bind.h b/absl/strings/internal/str_format/bind.h index 2bf0c085..cf41b197 100644 --- a/absl/strings/internal/str_format/bind.h +++ b/absl/strings/internal/str_format/bind.h @@ -122,8 +122,8 @@ class FormatSpecTemplate #endif // ABSL_INTERNAL_ENABLE_FORMAT_CHECKER template <Conv... C, typename = typename std::enable_if< - sizeof...(C) == sizeof...(Args) && - AllOf(Contains(ArgumentToConv<Args>(), + AllOf(sizeof...(C) == sizeof...(Args), + Contains(ArgumentToConv<Args>(), C)...)>::type> FormatSpecTemplate(const ExtendedParsedFormat<C...>& pc) // NOLINT : Base(&pc) {} diff --git a/absl/strings/internal/str_format/extension.h b/absl/strings/internal/str_format/extension.h index 51d7dd6f..0a764035 100644 --- a/absl/strings/internal/str_format/extension.h +++ b/absl/strings/internal/str_format/extension.h @@ -17,10 +17,12 @@ #define ABSL_STRINGS_INTERNAL_STR_FORMAT_EXTENSION_H_ #include <limits.h> + #include <cstddef> #include <cstring> #include <ostream> +#include "absl/base/config.h" #include "absl/base/port.h" #include "absl/strings/internal/str_format/output.h" #include "absl/strings/string_view.h" @@ -134,7 +136,7 @@ struct Flags { } }; -struct LengthMod { +struct ABSL_DLL LengthMod { public: enum Id : uint8_t { h, hh, l, ll, L, j, z, t, q, none @@ -196,7 +198,7 @@ struct LengthMod { X_VAL(n) X_SEP X_VAL(p) // clang-format on -struct ConversionChar { +struct ABSL_DLL ConversionChar { public: enum Id : uint8_t { c, C, s, S, // text diff --git a/absl/strings/numbers.cc b/absl/strings/numbers.cc index a0e5a7fd..68c26dd6 100644 --- a/absl/strings/numbers.cc +++ b/absl/strings/numbers.cc @@ -900,9 +900,10 @@ inline bool safe_uint_internal(absl::string_view text, IntType* value_p, namespace numbers_internal { // Digit conversion. -ABSL_CONST_INIT const char kHexChar[] = "0123456789abcdef"; +ABSL_CONST_INIT ABSL_DLL const char kHexChar[] = + "0123456789abcdef"; -ABSL_CONST_INIT const char kHexTable[513] = +ABSL_CONST_INIT ABSL_DLL const char kHexTable[513] = "000102030405060708090a0b0c0d0e0f" "101112131415161718191a1b1c1d1e1f" "202122232425262728292a2b2c2d2e2f" @@ -920,7 +921,7 @@ ABSL_CONST_INIT const char kHexTable[513] = "e0e1e2e3e4e5e6e7e8e9eaebecedeeef" "f0f1f2f3f4f5f6f7f8f9fafbfcfdfeff"; -ABSL_CONST_INIT const char two_ASCII_digits[100][2] = { +ABSL_CONST_INIT ABSL_DLL const char two_ASCII_digits[100][2] = { {'0', '0'}, {'0', '1'}, {'0', '2'}, {'0', '3'}, {'0', '4'}, {'0', '5'}, {'0', '6'}, {'0', '7'}, {'0', '8'}, {'0', '9'}, {'1', '0'}, {'1', '1'}, {'1', '2'}, {'1', '3'}, {'1', '4'}, {'1', '5'}, {'1', '6'}, {'1', '7'}, diff --git a/absl/strings/numbers.h b/absl/strings/numbers.h index 61204683..d872cca5 100644 --- a/absl/strings/numbers.h +++ b/absl/strings/numbers.h @@ -36,6 +36,7 @@ #include <string> #include <type_traits> +#include "absl/base/config.h" #include "absl/base/internal/bits.h" #ifdef __SSE4_2__ // TODO(jorg): Remove this when we figure out the right way @@ -106,9 +107,11 @@ ABSL_NAMESPACE_BEGIN namespace numbers_internal { // Digit conversion. -extern const char kHexChar[17]; // 0123456789abcdef -extern const char kHexTable[513]; // 000102030405060708090a0b0c0d0e0f1011... -extern const char two_ASCII_digits[100][2]; // 00, 01, 02, 03... +ABSL_DLL extern const char kHexChar[17]; // 0123456789abcdef +ABSL_DLL extern const char + kHexTable[513]; // 000102030405060708090a0b0c0d0e0f1011... +ABSL_DLL extern const char + two_ASCII_digits[100][2]; // 00, 01, 02, 03... // Writes a two-character representation of 'i' to 'buf'. 'i' must be in the // range 0 <= i < 100, and buf must have space for two characters. Example: diff --git a/absl/strings/string_view.h b/absl/strings/string_view.h index 4f7dd6b3..01965b0e 100644 --- a/absl/strings/string_view.h +++ b/absl/strings/string_view.h @@ -28,7 +28,19 @@ #define ABSL_STRINGS_STRING_VIEW_H_ #include <algorithm> +#include <cassert> +#include <cstddef> +#include <cstring> +#include <iosfwd> +#include <iterator> +#include <limits> +#include <string> + #include "absl/base/config.h" +#include "absl/base/internal/throw_delegate.h" +#include "absl/base/macros.h" +#include "absl/base/optimization.h" +#include "absl/base/port.h" #ifdef ABSL_USES_STD_STRING_VIEW @@ -49,19 +61,6 @@ ABSL_NAMESPACE_END #define ABSL_INTERNAL_STRING_VIEW_MEMCMP memcmp #endif // ABSL_HAVE_BUILTIN(__builtin_memcmp) -#include <cassert> -#include <cstddef> -#include <cstring> -#include <iosfwd> -#include <iterator> -#include <limits> -#include <string> - -#include "absl/base/internal/throw_delegate.h" -#include "absl/base/macros.h" -#include "absl/base/optimization.h" -#include "absl/base/port.h" - namespace absl { ABSL_NAMESPACE_BEGIN diff --git a/absl/time/format.cc b/absl/time/format.cc index 5997ef0c..ee088f33 100644 --- a/absl/time/format.cc +++ b/absl/time/format.cc @@ -24,11 +24,14 @@ namespace cctz = absl::time_internal::cctz; namespace absl { ABSL_NAMESPACE_BEGIN -extern const char RFC3339_full[] = "%Y-%m-%dT%H:%M:%E*S%Ez"; -extern const char RFC3339_sec[] = "%Y-%m-%dT%H:%M:%S%Ez"; - -extern const char RFC1123_full[] = "%a, %d %b %E4Y %H:%M:%S %z"; -extern const char RFC1123_no_wday[] = "%d %b %E4Y %H:%M:%S %z"; +ABSL_DLL extern const char RFC3339_full[] = + "%Y-%m-%dT%H:%M:%E*S%Ez"; +ABSL_DLL extern const char RFC3339_sec[] = "%Y-%m-%dT%H:%M:%S%Ez"; + +ABSL_DLL extern const char RFC1123_full[] = + "%a, %d %b %E4Y %H:%M:%S %z"; +ABSL_DLL extern const char RFC1123_no_wday[] = + "%d %b %E4Y %H:%M:%S %z"; namespace { diff --git a/absl/time/internal/cctz/src/time_zone_fixed.cc b/absl/time/internal/cctz/src/time_zone_fixed.cc index a342e37d..303c0244 100644 --- a/absl/time/internal/cctz/src/time_zone_fixed.cc +++ b/absl/time/internal/cctz/src/time_zone_fixed.cc @@ -89,29 +89,29 @@ std::string FixedOffsetToName(const seconds& offset) { // offsets and to (somewhat) limit the total number of zones. return "UTC"; } - int seconds = static_cast<int>(offset.count()); - const char sign = (seconds < 0 ? '-' : '+'); - int minutes = seconds / 60; - seconds %= 60; + int offset_seconds = static_cast<int>(offset.count()); + const char sign = (offset_seconds < 0 ? '-' : '+'); + int offset_minutes = offset_seconds / 60; + offset_seconds %= 60; if (sign == '-') { - if (seconds > 0) { - seconds -= 60; - minutes += 1; + if (offset_seconds > 0) { + offset_seconds -= 60; + offset_minutes += 1; } - seconds = -seconds; - minutes = -minutes; + offset_seconds = -offset_seconds; + offset_minutes = -offset_minutes; } - int hours = minutes / 60; - minutes %= 60; + int offset_hours = offset_minutes / 60; + offset_minutes %= 60; const std::size_t prefix_len = sizeof(kFixedZonePrefix) - 1; char buf[prefix_len + sizeof("-24:00:00")]; char* ep = std::copy(kFixedZonePrefix, kFixedZonePrefix + prefix_len, buf); *ep++ = sign; - ep = Format02d(ep, hours); + ep = Format02d(ep, offset_hours); *ep++ = ':'; - ep = Format02d(ep, minutes); + ep = Format02d(ep, offset_minutes); *ep++ = ':'; - ep = Format02d(ep, seconds); + ep = Format02d(ep, offset_seconds); *ep++ = '\0'; assert(ep == buf + sizeof(buf)); return buf; diff --git a/absl/time/internal/cctz/src/time_zone_format_test.cc b/absl/time/internal/cctz/src/time_zone_format_test.cc index de75629a..caebcc4d 100644 --- a/absl/time/internal/cctz/src/time_zone_format_test.cc +++ b/absl/time/internal/cctz/src/time_zone_format_test.cc @@ -1252,9 +1252,9 @@ TEST(Parse, ExtendedSubecondsScan) { const auto expected = chrono::system_clock::from_time_t(0) + chrono::nanoseconds(micros * 1000 + ns); for (int ps = 0; ps < 1000; ps += 250) { - std::ostringstream oss; + std::ostringstream ps_oss; oss << std::setfill('0') << std::setw(3) << ps; - const std::string input = nanos + oss.str() + "999"; + const std::string input = nanos + ps_oss.str() + "999"; EXPECT_TRUE(parse("%E*f", input, tz, &tp)); EXPECT_EQ(expected + chrono::nanoseconds(ps) / 1000, tp) << input; } diff --git a/absl/time/internal/cctz/src/time_zone_info.cc b/absl/time/internal/cctz/src/time_zone_info.cc index 971542d0..f1697cdf 100644 --- a/absl/time/internal/cctz/src/time_zone_info.cc +++ b/absl/time/internal/cctz/src/time_zone_info.cc @@ -641,9 +641,9 @@ std::unique_ptr<ZoneInfoSource> FileZoneInfoSource::Open( if (fp == nullptr) return nullptr; std::size_t length = 0; if (fseek(fp, 0, SEEK_END) == 0) { - long pos = ftell(fp); - if (pos >= 0) { - length = static_cast<std::size_t>(pos); + long offset = ftell(fp); + if (offset >= 0) { + length = static_cast<std::size_t>(offset); } rewind(fp); } diff --git a/absl/time/internal/cctz/src/time_zone_lookup_test.cc b/absl/time/internal/cctz/src/time_zone_lookup_test.cc index 227b1278..99137a08 100644 --- a/absl/time/internal/cctz/src/time_zone_lookup_test.cc +++ b/absl/time/internal/cctz/src/time_zone_lookup_test.cc @@ -1028,16 +1028,17 @@ TEST(MakeTime, LocalTimeLibC) { ASSERT_EQ(0, setenv("TZ", *np, 1)); // change what "localtime" means const auto zi = local_time_zone(); const auto lc = LoadZone("libc:localtime"); - time_zone::civil_transition trans; + time_zone::civil_transition transition; for (auto tp = zi.lookup(civil_second()).trans; - zi.next_transition(tp, &trans); tp = zi.lookup(trans.to).trans) { - const auto fcl = zi.lookup(trans.from); - const auto tcl = zi.lookup(trans.to); + zi.next_transition(tp, &transition); + tp = zi.lookup(transition.to).trans) { + const auto fcl = zi.lookup(transition.from); + const auto tcl = zi.lookup(transition.to); civil_second cs; // compare cs in zi and lc if (fcl.kind == time_zone::civil_lookup::UNIQUE) { if (tcl.kind == time_zone::civil_lookup::UNIQUE) { // Both unique; must be an is_dst or abbr change. - ASSERT_EQ(trans.from, trans.to); + ASSERT_EQ(transition.from, transition.to); const auto trans = fcl.trans; const auto tal = zi.lookup(trans); const auto tprev = trans - absl::time_internal::cctz::seconds(1); @@ -1048,11 +1049,11 @@ TEST(MakeTime, LocalTimeLibC) { continue; } ASSERT_EQ(time_zone::civil_lookup::REPEATED, tcl.kind); - cs = trans.to; + cs = transition.to; } else { ASSERT_EQ(time_zone::civil_lookup::UNIQUE, tcl.kind); ASSERT_EQ(time_zone::civil_lookup::SKIPPED, fcl.kind); - cs = trans.from; + cs = transition.from; } if (cs.year() > 2037) break; // limit test time (and to 32-bit time_t) const auto cl_zi = zi.lookup(cs); diff --git a/absl/time/time.h b/absl/time/time.h index 1be5727c..33a4a630 100644 --- a/absl/time/time.h +++ b/absl/time/time.h @@ -527,59 +527,30 @@ std::chrono::seconds ToChronoSeconds(Duration d); std::chrono::minutes ToChronoMinutes(Duration d); std::chrono::hours ToChronoHours(Duration d); - // FormatDuration() // -// Returns a string represention of the duration in a format consisting of a -// possibly-signed prefix and a sequence of decimal numbers, each with an -// optional fractional part and a unit suffix. -// -// Valid unit suffixes are "ns", "us" "ms", "s", "m", and "h". -// -// Simple examples include "300ms", "-1.5h", and "2h45m". Returns "inf" or -// "-inf" for +/- `InfiniteDuration()` values and "0" for `ZeroDuration()` -// values. -// -// This string format is used both as an input for parsing (when handling -// command-line flags of type `absl::Duration`) and as an output in -// `FormatDuration()` +// Returns a string representing the duration in the form "72h3m0.5s". +// Returns "inf" or "-inf" for +/- `InfiniteDuration()`. std::string FormatDuration(Duration d); +// Output stream operator. +inline std::ostream& operator<<(std::ostream& os, Duration d) { + return os << FormatDuration(d); +} + // ParseDuration() // -// Parses a `dur_string` of the format noted above into an `absl::Duration` -// value. -// -// Parses "0" as a zero-length duration value. Parses "-inf" or "+inf" as -// infinite durations values. +// Parses a duration string consisting of a possibly signed sequence of +// decimal numbers, each with an optional fractional part and a unit +// suffix. The valid suffixes are "ns", "us" "ms", "s", "m", and "h". +// Simple examples include "300ms", "-1.5h", and "2h45m". Parses "0" as +// `ZeroDuration()`. Parses "inf" and "-inf" as +/- `InfiniteDuration()`. bool ParseDuration(const std::string& dur_string, Duration* d); -// AbslParseFlag() -// -// Parses the command-line flag string representation `text` (using the format -// noted above) into an `absl::Duration` destination, setting `error` on -// failure. -// -// Example: -// -// --timeout=6h30m -// --timeout=inf // Equivalent to `InfiniteDuration()` -// --timeout=0 // Equivalent to `ZeroDuration()` +// Support for flag values of type Duration. Duration flags must be specified +// in a format that is valid input for absl::ParseDuration(). bool AbslParseFlag(absl::string_view text, Duration* dst, std::string* error); - -// AbslUnparseFlag() -// -// Unparses an `absl::Duration` into a command-line string representation using -// the format noted above. std::string AbslUnparseFlag(Duration d); - -// operator<<() -// -// Output stream operator, returning a stream in the format noted above. -inline std::ostream& operator<<(std::ostream& os, Duration d) { - return os << FormatDuration(d); -} - ABSL_DEPRECATED("Use AbslParseFlag() instead.") bool ParseFlag(const std::string& text, Duration* dst, std::string* error); ABSL_DEPRECATED("Use AbslUnparseFlag() instead.") @@ -842,29 +813,18 @@ Time FromChrono(const std::chrono::system_clock::time_point& tp); // // tp == std::chrono::system_clock::from_time_t(123); std::chrono::system_clock::time_point ToChronoTime(Time); -// AbslParseFlag() -// -// Parses the command-line flag string representation `text` into an -// `absl::Time` destination, setting `error` on failure. Time flag string -// representations must be specified in a format that matches -// `absl::RFC3339_full`. -// -// Example: +// Support for flag values of type Time. Time flags must be specified in a +// format that matches absl::RFC3339_full. For example: // // --start_time=2016-01-02T03:04:05.678+08:00 // // Note: A UTC offset (or 'Z' indicating a zero-offset from UTC) is required. // // Additionally, if you'd like to specify a time as a count of -// seconds/milliseconds/etc from the Unix epoch, use an `absl::Duration` flag -// and add that duration to `absl::UnixEpoch()` to get an `absl::Time`. +// seconds/milliseconds/etc from the Unix epoch, use an absl::Duration flag +// and add that duration to absl::UnixEpoch() to get an absl::Time. bool AbslParseFlag(absl::string_view text, Time* t, std::string* error); - -// AbslUnparseFlag() -// -// Unparses an `absl::Time` into a command-line string format as noted above. std::string AbslUnparseFlag(Time t); - ABSL_DEPRECATED("Use AbslParseFlag() instead.") bool ParseFlag(const std::string& text, Time* t, std::string* error); ABSL_DEPRECATED("Use AbslUnparseFlag() instead.") @@ -1243,15 +1203,18 @@ struct tm ToTM(Time t, TimeZone tz); // time with UTC offset. Also note the use of "%Y": RFC3339 mandates that // years have exactly four digits, but we allow them to take their natural // width. -extern const char RFC3339_full[]; // %Y-%m-%dT%H:%M:%E*S%Ez -extern const char RFC3339_sec[]; // %Y-%m-%dT%H:%M:%S%Ez +ABSL_DLL extern const char + RFC3339_full[]; // %Y-%m-%dT%H:%M:%E*S%Ez +ABSL_DLL extern const char RFC3339_sec[]; // %Y-%m-%dT%H:%M:%S%Ez // RFC1123_full // RFC1123_no_wday // // FormatTime()/ParseTime() format specifiers for RFC1123 date/time strings. -extern const char RFC1123_full[]; // %a, %d %b %E4Y %H:%M:%S %z -extern const char RFC1123_no_wday[]; // %d %b %E4Y %H:%M:%S %z +ABSL_DLL extern const char + RFC1123_full[]; // %a, %d %b %E4Y %H:%M:%S %z +ABSL_DLL extern const char + RFC1123_no_wday[]; // %d %b %E4Y %H:%M:%S %z // FormatTime() // |