Rename Thread -> OSThread.

runtime/vm/thread_linux.cc

-// 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(TARGET_OS_LINUX)
-
-#include "vm/thread.h"
-
-#include <errno.h>  // NOLINT
-#include <sys/resource.h>  // NOLINT
-#include <sys/time.h>  // NOLINT
-
-#include "platform/assert.h"
-#include "vm/isolate.h"
-
-namespace dart {
-
-#define VALIDATE_PTHREAD_RESULT(result) \
-  if (result != 0) { \
-    const int kBufferSize = 1024; \
-    char error_buf[kBufferSize]; \
-    FATAL2("pthread error: %d (%s)", result, \
-           strerror_r(result, error_buf, kBufferSize)); \
-  }
-
-
-#ifdef DEBUG
-#define RETURN_ON_PTHREAD_FAILURE(result) \
-  if (result != 0) { \
-    const int kBufferSize = 1024; \
-    char error_buf[kBufferSize]; \
-    fprintf(stderr, "%s:%d: pthread error: %d (%s)\n", \
-            __FILE__, __LINE__, result, \
-            strerror_r(result, error_buf, kBufferSize)); \
-    return result; \
-  }
-#else
-#define RETURN_ON_PTHREAD_FAILURE(result) \
-  if (result != 0) return result;
-#endif
-
-
-static void ComputeTimeSpecMicros(struct timespec* ts, int64_t micros) {
-  int64_t secs = micros / kMicrosecondsPerSecond;
-  int64_t nanos =
-      (micros - (secs * kMicrosecondsPerSecond)) * kNanosecondsPerMicrosecond;
-  int result = clock_gettime(CLOCK_MONOTONIC, ts);
-  ASSERT(result == 0);
-  ts->tv_sec += secs;
-  ts->tv_nsec += nanos;
-  if (ts->tv_nsec >= kNanosecondsPerSecond) {
-    ts->tv_sec += 1;
-    ts->tv_nsec -= kNanosecondsPerSecond;
-  }
-}
-
-
-class ThreadStartData {
- public:
-  ThreadStartData(Thread::ThreadStartFunction function,
-                  uword parameter)
-      : function_(function), parameter_(parameter) {}
-
-  Thread::ThreadStartFunction function() const { return function_; }
-  uword parameter() const { return parameter_; }
-
- private:
-  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);
-
-  Thread::ThreadStartFunction function = data->function();
-  uword parameter = data->parameter();
-  delete data;
-
-  // Call the supplied thread start function handing it its parameters.
-  function(parameter);
-
-  return NULL;
-}
-
-
-int Thread::Start(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(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;
-}
-
-
-ThreadLocalKey Thread::kUnsetThreadLocalKey = static_cast<pthread_key_t>(-1);
-ThreadId Thread::kInvalidThreadId = static_cast<ThreadId>(0);
-
-ThreadLocalKey Thread::CreateThreadLocal() {
-  pthread_key_t key = kUnsetThreadLocalKey;
-  int result = pthread_key_create(&key, NULL);
-  VALIDATE_PTHREAD_RESULT(result);
-  ASSERT(key != kUnsetThreadLocalKey);
-  return key;
-}
-
-
-void Thread::DeleteThreadLocal(ThreadLocalKey key) {
-  ASSERT(key != kUnsetThreadLocalKey);
-  int result = pthread_key_delete(key);
-  VALIDATE_PTHREAD_RESULT(result);
-}
-
-
-void Thread::SetThreadLocal(ThreadLocalKey key, uword value) {
-  ASSERT(key != kUnsetThreadLocalKey);
-  int result = pthread_setspecific(key, reinterpret_cast<void*>(value));
-  VALIDATE_PTHREAD_RESULT(result);
-}
-
-
-intptr_t Thread::GetMaxStackSize() {
-  const int kStackSize = (128 * kWordSize * KB);
-  return kStackSize;
-}
-
-
-ThreadId Thread::GetCurrentThreadId() {
-  return pthread_self();
-}
-
-
-bool Thread::Join(ThreadId id) {
-  return false;
-}
-
-
-intptr_t Thread::ThreadIdToIntPtr(ThreadId id) {
-  ASSERT(sizeof(id) == sizeof(intptr_t));
-  return static_cast<intptr_t>(id);
-}
-
-
-bool Thread::Compare(ThreadId a, ThreadId b) {
-  return pthread_equal(a, b) != 0;
-}
-
-
-void Thread::GetThreadCpuUsage(ThreadId thread_id, int64_t* cpu_usage) {
-  ASSERT(thread_id == GetCurrentThreadId());
-  ASSERT(cpu_usage != NULL);
-  struct timespec ts;
-  int r = clock_gettime(CLOCK_THREAD_CPUTIME_ID, &ts);
-  ASSERT(r == 0);
-  *cpu_usage = (ts.tv_sec * kNanosecondsPerSecond + ts.tv_nsec) /
-               kNanosecondsPerMicrosecond;
-}
-
-
-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);
-
-  // When running with assertions enabled we do track the owner.
-#if defined(DEBUG)
-  owner_ = NULL;
-#endif  // defined(DEBUG)
-}
-
-
-Mutex::~Mutex() {
-  int result = pthread_mutex_destroy(data_.mutex());
-  // Verify that the pthread_mutex was destroyed.
-  VALIDATE_PTHREAD_RESULT(result);
-
-  // When running with assertions enabled we do track the owner.
-#if defined(DEBUG)
-  ASSERT(owner_ == NULL);
-#endif  // defined(DEBUG)
-}
-
-
-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.
-  // When running with assertions enabled we do track the owner.
-#if defined(DEBUG)
-  owner_ = Isolate::Current();
-#endif  // defined(DEBUG)
-}
-
-
-bool Mutex::TryLock() {
-  int result = pthread_mutex_trylock(data_.mutex());
-  // Return false if the lock is busy and locking failed.
-  if (result == EBUSY) {
-    return false;
-  }
-  ASSERT(result == 0);  // Verify no other errors.
-  // When running with assertions enabled we do track the owner.
-#if defined(DEBUG)
-  owner_ = Isolate::Current();
-#endif  // defined(DEBUG)
-  return true;
-}
-
-
-void Mutex::Unlock() {
-  // When running with assertions enabled we do track the owner.
-#if defined(DEBUG)
-  ASSERT(owner_ == Isolate::Current());
-  owner_ = NULL;
-#endif  // defined(DEBUG)
-  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 mutex_attr;
-  int result = pthread_mutexattr_init(&mutex_attr);
-  VALIDATE_PTHREAD_RESULT(result);
-
-#if defined(DEBUG)
-  result = pthread_mutexattr_settype(&mutex_attr, PTHREAD_MUTEX_ERRORCHECK);
-  VALIDATE_PTHREAD_RESULT(result);
-#endif  // defined(DEBUG)
-
-  result = pthread_mutex_init(data_.mutex(), &mutex_attr);
-  VALIDATE_PTHREAD_RESULT(result);
-
-  result = pthread_mutexattr_destroy(&mutex_attr);
-  VALIDATE_PTHREAD_RESULT(result);
-
-  pthread_condattr_t cond_attr;
-  result = pthread_condattr_init(&cond_attr);
-  VALIDATE_PTHREAD_RESULT(result);
-
-  result = pthread_condattr_setclock(&cond_attr, CLOCK_MONOTONIC);
-  VALIDATE_PTHREAD_RESULT(result);
-
-  result = pthread_cond_init(data_.cond(), &cond_attr);
-  VALIDATE_PTHREAD_RESULT(result);
-
-  result = pthread_condattr_destroy(&cond_attr);
-  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;
-    ComputeTimeSpecMicros(&ts, micros);
-    int result = pthread_cond_timedwait(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 dart
-
-#endif  // defined(TARGET_OS_LINUX)