summaryrefslogtreecommitdiff
path: root/absl/log/internal/globals.cc
diff options
context:
space:
mode:
authorGravatar Gennadiy Rozental <rogeeff@google.com>2022-08-25 14:15:03 -0700
committerGravatar Copybara-Service <copybara-worker@google.com>2022-08-25 14:16:08 -0700
commit92fdbfb301f8b301b28ab5c99e7361e775c2fb8a (patch)
tree62026c7aae7b2ade948d1aab9138635717fe8bc1 /absl/log/internal/globals.cc
parent54022b0debdafa84faaef197f486fa83c68c22a4 (diff)
Release the Abseil Logging library
PiperOrigin-RevId: 470080638 Change-Id: I8d9ddfabc7704c383ed5a73abf0411f4c58a4bf7
Diffstat (limited to 'absl/log/internal/globals.cc')
-rw-r--r--absl/log/internal/globals.cc125
1 files changed, 125 insertions, 0 deletions
diff --git a/absl/log/internal/globals.cc b/absl/log/internal/globals.cc
new file mode 100644
index 00000000..863b047f
--- /dev/null
+++ b/absl/log/internal/globals.cc
@@ -0,0 +1,125 @@
+// Copyright 2022 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/log/internal/globals.h"
+
+#include <atomic>
+#include <cstdio>
+
+#include "absl/base/attributes.h"
+#include "absl/base/config.h"
+#include "absl/base/internal/raw_logging.h"
+#include "absl/base/log_severity.h"
+#include "absl/strings/string_view.h"
+#include "absl/time/time.h"
+
+namespace absl {
+ABSL_NAMESPACE_BEGIN
+namespace log_internal {
+
+namespace {
+// Keeps track of whether Logging initialization is finalized.
+// Log messages generated before that will go to stderr.
+ABSL_CONST_INIT std::atomic<bool> logging_initialized(false);
+
+// The TimeZone used for logging. This may only be set once.
+ABSL_CONST_INIT std::atomic<absl::TimeZone*> timezone_ptr{nullptr};
+
+// If true, the logging library will symbolize stack in fatal messages
+ABSL_CONST_INIT std::atomic<bool> symbolize_stack_trace(true);
+
+// Specifies maximum number of stack frames to report in fatal messages.
+ABSL_CONST_INIT std::atomic<int> max_frames_in_stack_trace(64);
+
+ABSL_CONST_INIT std::atomic<bool> exit_on_dfatal(true);
+ABSL_CONST_INIT std::atomic<bool> suppress_sigabort_trace(false);
+} // namespace
+
+bool IsInitialized() {
+ return logging_initialized.load(std::memory_order_acquire);
+}
+
+void SetInitialized() {
+ logging_initialized.store(true, std::memory_order_release);
+}
+
+void WriteToStderr(absl::string_view message, absl::LogSeverity severity) {
+ // Avoid using std::cerr from this module since we may get called during
+ // exit code, and cerr may be partially or fully destroyed by then.
+ std::fwrite(message.data(), message.size(), 1, stderr);
+
+#if defined(_WIN64) || defined(_WIN32) || defined(_WIN16)
+ // C99 requires stderr to not be fully-buffered by default (7.19.3.7), but
+ // MS CRT buffers it anyway, so we must `fflush` to ensure the string hits
+ // the console/file before the program dies (and takes the libc buffers
+ // with it).
+ // https://docs.microsoft.com/en-us/cpp/c-runtime-library/stream-i-o
+ if (severity >= absl::LogSeverity::kWarning) {
+ std::fflush(stderr);
+ }
+#else
+ // Avoid unused parameter warning in this branch.
+ (void)severity;
+#endif
+}
+
+void SetTimeZone(absl::TimeZone tz) {
+ absl::TimeZone* expected = nullptr;
+ absl::TimeZone* new_tz = new absl::TimeZone(tz);
+ // timezone_ptr can only be set once, otherwise new_tz is leaked.
+ if (!timezone_ptr.compare_exchange_strong(expected, new_tz,
+ std::memory_order_release,
+ std::memory_order_relaxed)) {
+ ABSL_RAW_LOG(FATAL,
+ "absl::log_internal::SetTimeZone() has already been called");
+ }
+}
+
+const absl::TimeZone* TimeZone() {
+ return timezone_ptr.load(std::memory_order_acquire);
+}
+
+bool ShouldSymbolizeLogStackTrace() {
+ return symbolize_stack_trace.load(std::memory_order_acquire);
+}
+
+void EnableSymbolizeLogStackTrace(bool on_off) {
+ symbolize_stack_trace.store(on_off, std::memory_order_release);
+}
+
+int MaxFramesInLogStackTrace() {
+ return max_frames_in_stack_trace.load(std::memory_order_acquire);
+}
+
+void SetMaxFramesInLogStackTrace(int max_num_frames) {
+ max_frames_in_stack_trace.store(max_num_frames, std::memory_order_release);
+}
+
+bool ExitOnDFatal() { return exit_on_dfatal.load(std::memory_order_acquire); }
+
+void SetExitOnDFatal(bool on_off) {
+ exit_on_dfatal.store(on_off, std::memory_order_release);
+}
+
+bool SuppressSigabortTrace() {
+ return suppress_sigabort_trace.load(std::memory_order_acquire);
+}
+
+bool SetSuppressSigabortTrace(bool on_off) {
+ return suppress_sigabort_trace.exchange(on_off);
+}
+
+} // namespace log_internal
+ABSL_NAMESPACE_END
+} // namespace absl