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-rw-r--r--absl/base/internal/raw_logging.h49
1 files changed, 46 insertions, 3 deletions
diff --git a/absl/base/internal/raw_logging.h b/absl/base/internal/raw_logging.h
index 04ff0607..2786a3de 100644
--- a/absl/base/internal/raw_logging.h
+++ b/absl/base/internal/raw_logging.h
@@ -19,7 +19,10 @@
#ifndef ABSL_BASE_INTERNAL_RAW_LOGGING_H_
#define ABSL_BASE_INTERNAL_RAW_LOGGING_H_
+#include <string>
+
#include "absl/base/attributes.h"
+#include "absl/base/internal/atomic_hook.h"
#include "absl/base/log_severity.h"
#include "absl/base/macros.h"
#include "absl/base/port.h"
@@ -57,6 +60,34 @@
} \
} while (0)
+// ABSL_INTERNAL_LOG and ABSL_INTERNAL_CHECK work like the RAW variants above,
+// except that if the richer log library is linked into the binary, we dispatch
+// to that instead. This is potentially useful for internal logging and
+// assertions, where we are using RAW_LOG neither for its async-signal-safety
+// nor for its non-allocating nature, but rather because raw logging has very
+// few other dependencies.
+//
+// The API is a subset of the above: each macro only takes two arguments. Use
+// StrCat if you need to build a richer message.
+#define ABSL_INTERNAL_LOG(severity, message) \
+ do { \
+ constexpr const char* absl_raw_logging_internal_basename = \
+ ::absl::raw_logging_internal::Basename(__FILE__, \
+ sizeof(__FILE__) - 1); \
+ ::absl::raw_logging_internal::internal_log_function( \
+ ABSL_RAW_LOGGING_INTERNAL_##severity, \
+ absl_raw_logging_internal_basename, __LINE__, message); \
+ } while (0)
+
+#define ABSL_INTERNAL_CHECK(condition, message) \
+ do { \
+ if (ABSL_PREDICT_FALSE(!(condition))) { \
+ std::string death_message = "Check " #condition " failed: "; \
+ death_message += std::string(message); \
+ ABSL_INTERNAL_LOG(FATAL, death_message); \
+ } \
+ } while (0)
+
#define ABSL_RAW_LOGGING_INTERNAL_INFO ::absl::LogSeverity::kInfo
#define ABSL_RAW_LOGGING_INTERNAL_WARNING ::absl::LogSeverity::kWarning
#define ABSL_RAW_LOGGING_INTERNAL_ERROR ::absl::LogSeverity::kError
@@ -65,7 +96,7 @@
::absl::NormalizeLogSeverity(severity)
namespace absl {
-inline namespace lts_2018_06_20 {
+inline namespace lts_2018_12_18 {
namespace raw_logging_internal {
// Helper function to implement ABSL_RAW_LOG
@@ -84,7 +115,7 @@ void SafeWriteToStderr(const char *s, size_t len);
// compile-time function to get the "base" filename, that is, the part of
// a filename after the last "/" or "\" path separator. The search starts at
-// the end of the std::string; the second parameter is the length of the std::string.
+// the end of the string; the second parameter is the length of the string.
constexpr const char* Basename(const char* fname, int offset) {
return offset == 0 || fname[offset - 1] == '/' || fname[offset - 1] == '\\'
? fname + offset
@@ -132,8 +163,20 @@ using LogPrefixHook = bool (*)(absl::LogSeverity severity, const char* file,
using AbortHook = void (*)(const char* file, int line, const char* buf_start,
const char* prefix_end, const char* buf_end);
+// Internal logging function for ABSL_INTERNAL_LOG to dispatch to.
+//
+// TODO(gfalcon): When string_view no longer depends on base, change this
+// interface to take its message as a string_view instead.
+using InternalLogFunction = void (*)(absl::LogSeverity severity,
+ const char* file, int line,
+ const std::string& message);
+
+extern base_internal::AtomicHook<InternalLogFunction> internal_log_function;
+
+void RegisterInternalLogFunction(InternalLogFunction func);
+
} // namespace raw_logging_internal
-} // inline namespace lts_2018_06_20
+} // inline namespace lts_2018_12_18
} // namespace absl
#endif // ABSL_BASE_INTERNAL_RAW_LOGGING_H_