mirror of
https://github.com/dart-lang/sdk
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b68351fbc3
TEST=build Change-Id: Ie3be570c274b0275a995a0f54b5e6ccdfc77ccd3 Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/292287 Commit-Queue: Ryan Macnak <rmacnak@google.com> Reviewed-by: Brian Quinlan <bquinlan@google.com>
200 lines
5.7 KiB
C++
200 lines
5.7 KiB
C++
// Copyright (c) 2022, the Dart project authors. Please see the AUTHORS file
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// for details. All rights reserved. Use of this source code is governed by a
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// BSD-style license that can be found in the LICENSE file.
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#include "platform/globals.h"
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#if defined(DART_USE_ABSL)
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#include <errno.h> // NOLINT
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#include <sys/resource.h> // NOLINT
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#include <sys/time.h> // NOLINT
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#include "bin/thread.h"
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#include "bin/thread_absl.h"
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#include "platform/assert.h"
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#include "platform/utils.h"
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namespace dart {
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namespace bin {
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#define VALIDATE_PTHREAD_RESULT(result) \
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if (result != 0) { \
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const int kBufferSize = 1024; \
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char error_buf[kBufferSize]; \
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FATAL("pthread error: %d (%s)", result, \
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Utils::StrError(result, error_buf, kBufferSize)); \
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}
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#ifdef DEBUG
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#define RETURN_ON_PTHREAD_FAILURE(result) \
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if (result != 0) { \
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const int kBufferSize = 1024; \
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char error_buf[kBufferSize]; \
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fprintf(stderr, "%s:%d: pthread error: %d (%s)\n", __FILE__, __LINE__, \
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result, Utils::StrError(result, error_buf, kBufferSize)); \
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return result; \
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}
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#else
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#define RETURN_ON_PTHREAD_FAILURE(result) \
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if (result != 0) { \
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return result; \
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}
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#endif
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class ThreadStartData {
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public:
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ThreadStartData(const char* name,
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Thread::ThreadStartFunction function,
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uword parameter)
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: name_(name), function_(function), parameter_(parameter) {}
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const char* name() const { return name_; }
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Thread::ThreadStartFunction function() const { return function_; }
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uword parameter() const { return parameter_; }
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private:
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const char* name_;
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Thread::ThreadStartFunction function_;
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uword parameter_;
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DISALLOW_COPY_AND_ASSIGN(ThreadStartData);
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};
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// Dispatch to the thread start function provided by the caller. This trampoline
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// is used to ensure that the thread is properly destroyed if the thread just
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// exits.
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static void* ThreadStart(void* data_ptr) {
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ThreadStartData* data = reinterpret_cast<ThreadStartData*>(data_ptr);
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const char* name = data->name();
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Thread::ThreadStartFunction function = data->function();
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uword parameter = data->parameter();
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delete data;
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#if defined(DART_HOST_OS_ANDROID) || defined(DART_HOST_OS_LINUX)
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// Set the thread name. There is 16 bytes limit on the name (including \0).
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// pthread_setname_np ignores names that are too long rather than truncating.
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char truncated_name[16];
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snprintf(truncated_name, sizeof(truncated_name), "%s", name);
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pthread_setname_np(pthread_self(), truncated_name);
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#elif defined(DART_HOST_OS_MACOS)
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// Set the thread name.
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pthread_setname_np(name);
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#endif
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// Call the supplied thread start function handing it its parameters.
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function(parameter);
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return nullptr;
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}
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int Thread::Start(const char* name,
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ThreadStartFunction function,
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uword parameter) {
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pthread_attr_t attr;
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int result = pthread_attr_init(&attr);
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RETURN_ON_PTHREAD_FAILURE(result);
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result = pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED);
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RETURN_ON_PTHREAD_FAILURE(result);
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result = pthread_attr_setstacksize(&attr, Thread::GetMaxStackSize());
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RETURN_ON_PTHREAD_FAILURE(result);
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ThreadStartData* data = new ThreadStartData(name, function, parameter);
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pthread_t tid;
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result = pthread_create(&tid, &attr, ThreadStart, data);
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RETURN_ON_PTHREAD_FAILURE(result);
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result = pthread_attr_destroy(&attr);
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RETURN_ON_PTHREAD_FAILURE(result);
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return 0;
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}
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const ThreadId Thread::kInvalidThreadId = static_cast<ThreadId>(0);
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intptr_t Thread::GetMaxStackSize() {
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const int kStackSize = (128 * kWordSize * KB);
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return kStackSize;
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}
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ThreadId Thread::GetCurrentThreadId() {
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return pthread_self();
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}
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bool Thread::Compare(ThreadId a, ThreadId b) {
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return (pthread_equal(a, b) != 0);
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}
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Mutex::Mutex() : data_() {}
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Mutex::~Mutex() {}
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ABSL_NO_THREAD_SAFETY_ANALYSIS
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void Mutex::Lock() {
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data_.mutex()->Lock();
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}
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ABSL_NO_THREAD_SAFETY_ANALYSIS
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bool Mutex::TryLock() {
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if (!data_.mutex()->TryLock()) {
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return false;
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}
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return true;
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}
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ABSL_NO_THREAD_SAFETY_ANALYSIS
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void Mutex::Unlock() {
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data_.mutex()->Unlock();
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}
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Monitor::Monitor() : data_() {}
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Monitor::~Monitor() {}
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ABSL_NO_THREAD_SAFETY_ANALYSIS
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void Monitor::Enter() {
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data_.mutex()->Lock();
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}
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ABSL_NO_THREAD_SAFETY_ANALYSIS
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void Monitor::Exit() {
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data_.mutex()->Unlock();
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}
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Monitor::WaitResult Monitor::Wait(int64_t millis) {
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return WaitMicros(millis * kMicrosecondsPerMillisecond);
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}
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ABSL_NO_THREAD_SAFETY_ANALYSIS
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Monitor::WaitResult Monitor::WaitMicros(int64_t micros) {
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Monitor::WaitResult retval = kNotified;
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if (micros == kNoTimeout) {
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// Wait forever.
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data_.cond()->Wait(data_.mutex());
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} else {
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if (data_.cond()->WaitWithTimeout(data_.mutex(),
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absl::Microseconds(micros))) {
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retval = kTimedOut;
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}
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}
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return retval;
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}
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ABSL_NO_THREAD_SAFETY_ANALYSIS
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void Monitor::Notify() {
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data_.cond()->Signal();
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}
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ABSL_NO_THREAD_SAFETY_ANALYSIS
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void Monitor::NotifyAll() {
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data_.cond()->SignalAll();
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}
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} // namespace bin
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} // namespace dart
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#endif // defined(DART_USE_ABSL)
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