mirror of
https://github.com/dart-lang/sdk
synced 2024-11-05 18:22:09 +00:00
291 lines
8.9 KiB
C++
291 lines
8.9 KiB
C++
// Copyright (c) 2012, 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(HOST_OS_MACOS)
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#include "bin/thread.h"
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#include "bin/thread_macos.h"
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#include <mach/mach_host.h> // NOLINT
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#include <mach/mach_init.h> // NOLINT
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#include <mach/mach_port.h> // NOLINT
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#include <mach/mach_traps.h> // NOLINT
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#include <mach/task_info.h> // NOLINT
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#include <mach/thread_act.h> // NOLINT
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#include <mach/thread_info.h> // NOLINT
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#include <sys/errno.h> // NOLINT
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#include <sys/sysctl.h> // NOLINT
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#include <sys/types.h> // NOLINT
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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_message[kBufferSize]; \
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Utils::StrError(result, error_message, kBufferSize); \
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FATAL2("pthread error: %d (%s)", result, error_message); \
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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_message[kBufferSize]; \
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Utils::StrError(result, error_message, kBufferSize); \
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fprintf(stderr, "%s:%d: pthread error: %d (%s)\n", __FILE__, __LINE__, \
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result, error_message); \
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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(Thread::ThreadStartFunction function, uword parameter)
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: function_(function), parameter_(parameter) {}
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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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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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Thread::ThreadStartFunction function = data->function();
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uword parameter = data->parameter();
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delete data;
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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 NULL;
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}
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int Thread::Start(ThreadStartFunction function, 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(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 ThreadLocalKey Thread::kUnsetThreadLocalKey =
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static_cast<pthread_key_t>(-1);
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const ThreadId Thread::kInvalidThreadId = reinterpret_cast<ThreadId>(NULL);
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ThreadLocalKey Thread::CreateThreadLocal() {
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pthread_key_t key = kUnsetThreadLocalKey;
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int result = pthread_key_create(&key, NULL);
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VALIDATE_PTHREAD_RESULT(result);
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ASSERT(key != kUnsetThreadLocalKey);
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return key;
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}
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void Thread::DeleteThreadLocal(ThreadLocalKey key) {
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ASSERT(key != kUnsetThreadLocalKey);
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int result = pthread_key_delete(key);
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VALIDATE_PTHREAD_RESULT(result);
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}
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void Thread::SetThreadLocal(ThreadLocalKey key, uword value) {
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ASSERT(key != kUnsetThreadLocalKey);
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int result = pthread_setspecific(key, reinterpret_cast<void*>(value));
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VALIDATE_PTHREAD_RESULT(result);
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}
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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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intptr_t Thread::ThreadIdToIntPtr(ThreadId id) {
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ASSERT(sizeof(id) == sizeof(intptr_t));
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return reinterpret_cast<intptr_t>(id);
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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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void Thread::InitOnce() {
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// Nothing to be done.
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}
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Mutex::Mutex() {
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pthread_mutexattr_t attr;
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int result = pthread_mutexattr_init(&attr);
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VALIDATE_PTHREAD_RESULT(result);
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#if defined(DEBUG)
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result = pthread_mutexattr_settype(&attr, PTHREAD_MUTEX_ERRORCHECK);
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VALIDATE_PTHREAD_RESULT(result);
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#endif // defined(DEBUG)
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result = pthread_mutex_init(data_.mutex(), &attr);
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// Verify that creating a pthread_mutex succeeded.
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VALIDATE_PTHREAD_RESULT(result);
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result = pthread_mutexattr_destroy(&attr);
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VALIDATE_PTHREAD_RESULT(result);
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}
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Mutex::~Mutex() {
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int result = pthread_mutex_destroy(data_.mutex());
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// Verify that the pthread_mutex was destroyed.
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VALIDATE_PTHREAD_RESULT(result);
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}
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void Mutex::Lock() {
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int result = pthread_mutex_lock(data_.mutex());
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// Specifically check for dead lock to help debugging.
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ASSERT(result != EDEADLK);
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ASSERT(result == 0); // Verify no other errors.
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// TODO(iposva): Do we need to track lock owners?
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}
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bool Mutex::TryLock() {
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int result = pthread_mutex_trylock(data_.mutex());
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// Return false if the lock is busy and locking failed.
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if ((result == EBUSY) || (result == EDEADLK)) {
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return false;
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}
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ASSERT(result == 0); // Verify no other errors.
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// TODO(iposva): Do we need to track lock owners?
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return true;
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}
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void Mutex::Unlock() {
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// TODO(iposva): Do we need to track lock owners?
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int result = pthread_mutex_unlock(data_.mutex());
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// Specifically check for wrong thread unlocking to aid debugging.
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ASSERT(result != EPERM);
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ASSERT(result == 0); // Verify no other errors.
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}
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Monitor::Monitor() {
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pthread_mutexattr_t attr;
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int result = pthread_mutexattr_init(&attr);
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VALIDATE_PTHREAD_RESULT(result);
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#if defined(DEBUG)
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result = pthread_mutexattr_settype(&attr, PTHREAD_MUTEX_ERRORCHECK);
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VALIDATE_PTHREAD_RESULT(result);
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#endif // defined(DEBUG)
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result = pthread_mutex_init(data_.mutex(), &attr);
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VALIDATE_PTHREAD_RESULT(result);
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result = pthread_mutexattr_destroy(&attr);
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VALIDATE_PTHREAD_RESULT(result);
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result = pthread_cond_init(data_.cond(), NULL);
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VALIDATE_PTHREAD_RESULT(result);
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}
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Monitor::~Monitor() {
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int result = pthread_mutex_destroy(data_.mutex());
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VALIDATE_PTHREAD_RESULT(result);
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result = pthread_cond_destroy(data_.cond());
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VALIDATE_PTHREAD_RESULT(result);
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}
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void Monitor::Enter() {
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int result = pthread_mutex_lock(data_.mutex());
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VALIDATE_PTHREAD_RESULT(result);
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// TODO(iposva): Do we need to track lock owners?
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}
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void Monitor::Exit() {
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// TODO(iposva): Do we need to track lock owners?
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int result = pthread_mutex_unlock(data_.mutex());
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VALIDATE_PTHREAD_RESULT(result);
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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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Monitor::WaitResult Monitor::WaitMicros(int64_t micros) {
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// TODO(iposva): Do we need to track lock owners?
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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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int result = pthread_cond_wait(data_.cond(), data_.mutex());
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VALIDATE_PTHREAD_RESULT(result);
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} else {
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struct timespec ts;
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int64_t secs = micros / kMicrosecondsPerSecond;
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if (secs > kMaxInt32) {
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// Avoid truncation of overly large timeout values.
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secs = kMaxInt32;
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}
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int64_t nanos =
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(micros - (secs * kMicrosecondsPerSecond)) * kNanosecondsPerMicrosecond;
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ts.tv_sec = static_cast<int32_t>(secs);
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ts.tv_nsec = static_cast<long>(nanos); // NOLINT (long used in timespec).
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int result =
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pthread_cond_timedwait_relative_np(data_.cond(), data_.mutex(), &ts);
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ASSERT((result == 0) || (result == ETIMEDOUT));
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if (result == ETIMEDOUT) {
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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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void Monitor::Notify() {
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// TODO(iposva): Do we need to track lock owners?
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int result = pthread_cond_signal(data_.cond());
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VALIDATE_PTHREAD_RESULT(result);
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}
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void Monitor::NotifyAll() {
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// TODO(iposva): Do we need to track lock owners?
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int result = pthread_cond_broadcast(data_.cond());
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VALIDATE_PTHREAD_RESULT(result);
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}
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} // namespace bin
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} // namespace dart
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#endif // defined(HOST_OS_MACOS)
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