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// Copyright (c) 2012, the Dart project authors. Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.
#include "platform/globals.h"
#if defined(DART_HOST_OS_MACOS) && !defined(DART_USE_ABSL)
#include "bin/thread.h"
#include "bin/thread_macos.h"
#include <mach/mach_host.h> // NOLINT
#include <mach/mach_init.h> // NOLINT
#include <mach/mach_port.h> // NOLINT
#include <mach/mach_traps.h> // NOLINT
#include <mach/task_info.h> // NOLINT
#include <mach/thread_act.h> // NOLINT
#include <mach/thread_info.h> // NOLINT
#include <sys/errno.h> // NOLINT
#include <sys/sysctl.h> // NOLINT
#include <sys/types.h> // NOLINT
#include "platform/assert.h"
#include "platform/utils.h"
namespace dart {
namespace bin {
#define VALIDATE_PTHREAD_RESULT(result) \
if (result != 0) { \
const int kBufferSize = 1024; \
char error_message[kBufferSize]; \
Utils::StrError(result, error_message, kBufferSize); \
FATAL("pthread error: %d (%s)", result, error_message); \
}
#ifdef DEBUG
#define RETURN_ON_PTHREAD_FAILURE(result) \
if (result != 0) { \
const int kBufferSize = 1024; \
char error_message[kBufferSize]; \
Utils::StrError(result, error_message, kBufferSize); \
fprintf(stderr, "%s:%d: pthread error: %d (%s)\n", __FILE__, __LINE__, \
result, error_message); \
return result; \
}
#else
#define RETURN_ON_PTHREAD_FAILURE(result) \
if (result != 0) { \
return result; \
}
#endif
class ThreadStartData {
public:
ThreadStartData(const char* name,
Thread::ThreadStartFunction function,
uword parameter)
: name_(name), function_(function), parameter_(parameter) {}
const char* name() const { return name_; }
Thread::ThreadStartFunction function() const { return function_; }
uword parameter() const { return parameter_; }
private:
const char* name_;
Thread::ThreadStartFunction function_;
uword parameter_;
DISALLOW_COPY_AND_ASSIGN(ThreadStartData);
};
// Dispatch to the thread start function provided by the caller. This trampoline
// is used to ensure that the thread is properly destroyed if the thread just
// exits.
static void* ThreadStart(void* data_ptr) {
ThreadStartData* data = reinterpret_cast<ThreadStartData*>(data_ptr);
const char* name = data->name();
Thread::ThreadStartFunction function = data->function();
uword parameter = data->parameter();
delete data;
// Set the thread name. We need to impose a limit on the name length so that
// we can know how large of a buffer to use when retrieving the name. We
// truncate the name at 16 bytes to be consistent with Android and Linux.
char truncated_name[16];
snprintf(truncated_name, sizeof(truncated_name), "%s", name);
pthread_setname_np(name);
// Call the supplied thread start function handing it its parameters.
function(parameter);
return nullptr;
}
int Thread::Start(const char* name,
ThreadStartFunction function,
uword parameter) {
pthread_attr_t attr;
int result = pthread_attr_init(&attr);
RETURN_ON_PTHREAD_FAILURE(result);
result = pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED);
RETURN_ON_PTHREAD_FAILURE(result);
result = pthread_attr_setstacksize(&attr, Thread::GetMaxStackSize());
RETURN_ON_PTHREAD_FAILURE(result);
ThreadStartData* data = new ThreadStartData(name, function, parameter);
pthread_t tid;
result = pthread_create(&tid, &attr, ThreadStart, data);
RETURN_ON_PTHREAD_FAILURE(result);
result = pthread_attr_destroy(&attr);
RETURN_ON_PTHREAD_FAILURE(result);
return 0;
}
const ThreadId Thread::kInvalidThreadId = static_cast<ThreadId>(nullptr);
intptr_t Thread::GetMaxStackSize() {
const int kStackSize = (128 * kWordSize * KB);
return kStackSize;
}
ThreadId Thread::GetCurrentThreadId() {
return pthread_self();
}
bool Thread::Compare(ThreadId a, ThreadId b) {
return (pthread_equal(a, b) != 0);
}
Mutex::Mutex() {
pthread_mutexattr_t attr;
int result = pthread_mutexattr_init(&attr);
VALIDATE_PTHREAD_RESULT(result);
#if defined(DEBUG)
result = pthread_mutexattr_settype(&attr, PTHREAD_MUTEX_ERRORCHECK);
VALIDATE_PTHREAD_RESULT(result);
#endif // defined(DEBUG)
result = pthread_mutex_init(data_.mutex(), &attr);
// Verify that creating a pthread_mutex succeeded.
VALIDATE_PTHREAD_RESULT(result);
result = pthread_mutexattr_destroy(&attr);
VALIDATE_PTHREAD_RESULT(result);
}
Mutex::~Mutex() {
int result = pthread_mutex_destroy(data_.mutex());
// Verify that the pthread_mutex was destroyed.
VALIDATE_PTHREAD_RESULT(result);
}
void Mutex::Lock() {
int result = pthread_mutex_lock(data_.mutex());
// Specifically check for dead lock to help debugging.
ASSERT(result != EDEADLK);
ASSERT(result == 0); // Verify no other errors.
// TODO(iposva): Do we need to track lock owners?
}
bool Mutex::TryLock() {
int result = pthread_mutex_trylock(data_.mutex());
// Return false if the lock is busy and locking failed.
if ((result == EBUSY) || (result == EDEADLK)) {
return false;
}
ASSERT(result == 0); // Verify no other errors.
// TODO(iposva): Do we need to track lock owners?
return true;
}
void Mutex::Unlock() {
// TODO(iposva): Do we need to track lock owners?
int result = pthread_mutex_unlock(data_.mutex());
// Specifically check for wrong thread unlocking to aid debugging.
ASSERT(result != EPERM);
ASSERT(result == 0); // Verify no other errors.
}
Monitor::Monitor() {
pthread_mutexattr_t attr;
int result = pthread_mutexattr_init(&attr);
VALIDATE_PTHREAD_RESULT(result);
#if defined(DEBUG)
result = pthread_mutexattr_settype(&attr, PTHREAD_MUTEX_ERRORCHECK);
VALIDATE_PTHREAD_RESULT(result);
#endif // defined(DEBUG)
result = pthread_mutex_init(data_.mutex(), &attr);
VALIDATE_PTHREAD_RESULT(result);
result = pthread_mutexattr_destroy(&attr);
VALIDATE_PTHREAD_RESULT(result);
result = pthread_cond_init(data_.cond(), nullptr);
VALIDATE_PTHREAD_RESULT(result);
}
Monitor::~Monitor() {
int result = pthread_mutex_destroy(data_.mutex());
VALIDATE_PTHREAD_RESULT(result);
result = pthread_cond_destroy(data_.cond());
VALIDATE_PTHREAD_RESULT(result);
}
void Monitor::Enter() {
int result = pthread_mutex_lock(data_.mutex());
VALIDATE_PTHREAD_RESULT(result);
// TODO(iposva): Do we need to track lock owners?
}
void Monitor::Exit() {
// TODO(iposva): Do we need to track lock owners?
int result = pthread_mutex_unlock(data_.mutex());
VALIDATE_PTHREAD_RESULT(result);
}
Monitor::WaitResult Monitor::Wait(int64_t millis) {
return WaitMicros(millis * kMicrosecondsPerMillisecond);
}
Monitor::WaitResult Monitor::WaitMicros(int64_t micros) {
// TODO(iposva): Do we need to track lock owners?
Monitor::WaitResult retval = kNotified;
if (micros == kNoTimeout) {
// Wait forever.
int result = pthread_cond_wait(data_.cond(), data_.mutex());
VALIDATE_PTHREAD_RESULT(result);
} else {
struct timespec ts;
int64_t secs = micros / kMicrosecondsPerSecond;
if (secs > kMaxInt32) {
// Avoid truncation of overly large timeout values.
secs = kMaxInt32;
}
int64_t nanos =
(micros - (secs * kMicrosecondsPerSecond)) * kNanosecondsPerMicrosecond;
ts.tv_sec = static_cast<int32_t>(secs);
ts.tv_nsec = static_cast<long>(nanos); // NOLINT (long used in timespec).
int result =
pthread_cond_timedwait_relative_np(data_.cond(), data_.mutex(), &ts);
ASSERT((result == 0) || (result == ETIMEDOUT));
if (result == ETIMEDOUT) {
retval = kTimedOut;
}
}
return retval;
}
void Monitor::Notify() {
// TODO(iposva): Do we need to track lock owners?
int result = pthread_cond_signal(data_.cond());
VALIDATE_PTHREAD_RESULT(result);
}
void Monitor::NotifyAll() {
// TODO(iposva): Do we need to track lock owners?
int result = pthread_cond_broadcast(data_.cond());
VALIDATE_PTHREAD_RESULT(result);
}
} // namespace bin
} // namespace dart
#endif // defined(DART_HOST_OS_MACOS) && !defined(DART_USE_ABSL)