Import Cobalt 19.master.0.205881
diff --git a/src/base/threading/platform_thread_posix.cc b/src/base/threading/platform_thread_posix.cc
new file mode 100644
index 0000000..829d0db
--- /dev/null
+++ b/src/base/threading/platform_thread_posix.cc
@@ -0,0 +1,307 @@
+// Copyright (c) 2012 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "base/threading/platform_thread.h"
+
+#include <errno.h>
+#include <pthread.h>
+#include <sched.h>
+#include <sys/time.h>
+#include <sys/types.h>
+#include <unistd.h>
+
+#include <memory>
+
+#include "starboard/types.h"
+
+#include "base/debug/activity_tracker.h"
+#include "base/lazy_instance.h"
+#include "base/logging.h"
+#include "base/threading/platform_thread_internal_posix.h"
+#include "base/threading/scoped_blocking_call.h"
+#include "base/threading/thread_id_name_manager.h"
+#include "build/build_config.h"
+
+#if !defined(OS_MACOSX) && !defined(OS_FUCHSIA) && !defined(OS_NACL)
+#include "base/posix/can_lower_nice_to.h"
+#endif
+
+#if defined(OS_LINUX)
+#include <sys/syscall.h>
+#endif
+
+#if defined(OS_FUCHSIA)
+#include <zircon/process.h>
+#else
+#include <sys/resource.h>
+#endif
+
+namespace base {
+
+void InitThreading();
+void TerminateOnThread();
+size_t GetDefaultThreadStackSize(const pthread_attr_t& attributes);
+
+namespace {
+
+struct ThreadParams {
+ ThreadParams()
+ : delegate(nullptr), joinable(false), priority(ThreadPriority::NORMAL) {}
+
+ PlatformThread::Delegate* delegate;
+ bool joinable;
+ ThreadPriority priority;
+};
+
+void* ThreadFunc(void* params) {
+ PlatformThread::Delegate* delegate = nullptr;
+
+ {
+ std::unique_ptr<ThreadParams> thread_params(
+ static_cast<ThreadParams*>(params));
+
+ delegate = thread_params->delegate;
+ if (!thread_params->joinable)
+ base::ThreadRestrictions::SetSingletonAllowed(false);
+
+#if !defined(OS_NACL)
+ // Threads on linux/android may inherit their priority from the thread
+ // where they were created. This explicitly sets the priority of all new
+ // threads.
+ PlatformThread::SetCurrentThreadPriority(thread_params->priority);
+#endif
+ }
+
+ ThreadIdNameManager::GetInstance()->RegisterThread(
+ PlatformThread::CurrentHandle().platform_handle(),
+ PlatformThread::CurrentId());
+
+ delegate->ThreadMain();
+
+ ThreadIdNameManager::GetInstance()->RemoveName(
+ PlatformThread::CurrentHandle().platform_handle(),
+ PlatformThread::CurrentId());
+
+ base::TerminateOnThread();
+ return nullptr;
+}
+
+bool CreateThread(size_t stack_size,
+ bool joinable,
+ PlatformThread::Delegate* delegate,
+ PlatformThreadHandle* thread_handle,
+ ThreadPriority priority) {
+ DCHECK(thread_handle);
+ base::InitThreading();
+
+ pthread_attr_t attributes;
+ pthread_attr_init(&attributes);
+
+ // Pthreads are joinable by default, so only specify the detached
+ // attribute if the thread should be non-joinable.
+ if (!joinable)
+ pthread_attr_setdetachstate(&attributes, PTHREAD_CREATE_DETACHED);
+
+ // Get a better default if available.
+ if (stack_size == 0)
+ stack_size = base::GetDefaultThreadStackSize(attributes);
+
+ if (stack_size > 0)
+ pthread_attr_setstacksize(&attributes, stack_size);
+
+ std::unique_ptr<ThreadParams> params(new ThreadParams);
+ params->delegate = delegate;
+ params->joinable = joinable;
+ params->priority = priority;
+
+ pthread_t handle;
+ int err = pthread_create(&handle, &attributes, ThreadFunc, params.get());
+ bool success = !err;
+ if (success) {
+ // ThreadParams should be deleted on the created thread after used.
+ ignore_result(params.release());
+ } else {
+ // Value of |handle| is undefined if pthread_create fails.
+ handle = 0;
+ errno = err;
+ PLOG(ERROR) << "pthread_create";
+ }
+ *thread_handle = PlatformThreadHandle(handle);
+
+ pthread_attr_destroy(&attributes);
+
+ return success;
+}
+
+} // namespace
+
+// static
+PlatformThreadId PlatformThread::CurrentId() {
+ // Pthreads doesn't have the concept of a thread ID, so we have to reach down
+ // into the kernel.
+#if defined(OS_MACOSX)
+ return pthread_mach_thread_np(pthread_self());
+#elif defined(OS_LINUX)
+ return syscall(__NR_gettid);
+#elif defined(OS_ANDROID)
+ return gettid();
+#elif defined(OS_FUCHSIA)
+ return zx_thread_self();
+#elif defined(OS_SOLARIS) || defined(OS_QNX)
+ return pthread_self();
+#elif defined(OS_NACL) && defined(__GLIBC__)
+ return pthread_self();
+#elif defined(OS_NACL) && !defined(__GLIBC__)
+ // Pointers are 32-bits in NaCl.
+ return reinterpret_cast<int32_t>(pthread_self());
+#elif defined(OS_POSIX) && defined(OS_AIX)
+ return pthread_self();
+#elif defined(OS_POSIX) && !defined(OS_AIX)
+ return reinterpret_cast<int64_t>(pthread_self());
+#endif
+}
+
+// static
+PlatformThreadRef PlatformThread::CurrentRef() {
+ return PlatformThreadRef(pthread_self());
+}
+
+// static
+PlatformThreadHandle PlatformThread::CurrentHandle() {
+ return PlatformThreadHandle(pthread_self());
+}
+
+// static
+void PlatformThread::YieldCurrentThread() {
+ sched_yield();
+}
+
+// static
+void PlatformThread::Sleep(TimeDelta duration) {
+ struct timespec sleep_time, remaining;
+
+ // Break the duration into seconds and nanoseconds.
+ // NOTE: TimeDelta's microseconds are int64s while timespec's
+ // nanoseconds are longs, so this unpacking must prevent overflow.
+ sleep_time.tv_sec = duration.InSeconds();
+ duration -= TimeDelta::FromSeconds(sleep_time.tv_sec);
+ sleep_time.tv_nsec = duration.InMicroseconds() * 1000; // nanoseconds
+
+ while (nanosleep(&sleep_time, &remaining) == -1 && errno == EINTR)
+ sleep_time = remaining;
+}
+
+// static
+const char* PlatformThread::GetName() {
+ return ThreadIdNameManager::GetInstance()->GetName(CurrentId());
+}
+
+// static
+bool PlatformThread::CreateWithPriority(size_t stack_size, Delegate* delegate,
+ PlatformThreadHandle* thread_handle,
+ ThreadPriority priority) {
+ return CreateThread(stack_size, true /* joinable thread */, delegate,
+ thread_handle, priority);
+}
+
+// static
+bool PlatformThread::CreateNonJoinable(size_t stack_size, Delegate* delegate) {
+ return CreateNonJoinableWithPriority(stack_size, delegate,
+ ThreadPriority::NORMAL);
+}
+
+// static
+bool PlatformThread::CreateNonJoinableWithPriority(size_t stack_size,
+ Delegate* delegate,
+ ThreadPriority priority) {
+ PlatformThreadHandle unused;
+
+ bool result = CreateThread(stack_size, false /* non-joinable thread */,
+ delegate, &unused, priority);
+ return result;
+}
+
+// static
+void PlatformThread::Join(PlatformThreadHandle thread_handle) {
+ // Record the event that this thread is blocking upon (for hang diagnosis).
+ base::debug::ScopedThreadJoinActivity thread_activity(&thread_handle);
+
+ // Joining another thread may block the current thread for a long time, since
+ // the thread referred to by |thread_handle| may still be running long-lived /
+ // blocking tasks.
+ base::ScopedBlockingCall scoped_blocking_call(base::BlockingType::MAY_BLOCK);
+ CHECK_EQ(0, pthread_join(thread_handle.platform_handle(), nullptr));
+}
+
+// static
+void PlatformThread::Detach(PlatformThreadHandle thread_handle) {
+ CHECK_EQ(0, pthread_detach(thread_handle.platform_handle()));
+}
+
+// Mac and Fuchsia have their own Set/GetCurrentThreadPriority()
+// implementations.
+#if !defined(OS_MACOSX) && !defined(OS_FUCHSIA)
+
+// static
+bool PlatformThread::CanIncreaseThreadPriority(ThreadPriority priority) {
+#if defined(OS_NACL)
+ return false;
+#else
+ return internal::CanLowerNiceTo(
+ internal::ThreadPriorityToNiceValue(priority));
+#endif // defined(OS_NACL)
+}
+
+// static
+void PlatformThread::SetCurrentThreadPriority(ThreadPriority priority) {
+#if defined(OS_NACL)
+ NOTIMPLEMENTED();
+#else
+ if (internal::SetCurrentThreadPriorityForPlatform(priority))
+ return;
+
+ // setpriority(2) should change the whole thread group's (i.e. process)
+ // priority. However, as stated in the bugs section of
+ // http://man7.org/linux/man-pages/man2/getpriority.2.html: "under the current
+ // Linux/NPTL implementation of POSIX threads, the nice value is a per-thread
+ // attribute". Also, 0 is prefered to the current thread id since it is
+ // equivalent but makes sandboxing easier (https://crbug.com/399473).
+ const int nice_setting = internal::ThreadPriorityToNiceValue(priority);
+ if (setpriority(PRIO_PROCESS, 0, nice_setting)) {
+ DVPLOG(1) << "Failed to set nice value of thread ("
+ << PlatformThread::CurrentId() << ") to " << nice_setting;
+ }
+#endif // defined(OS_NACL)
+}
+
+// static
+ThreadPriority PlatformThread::GetCurrentThreadPriority() {
+#if defined(OS_NACL)
+ NOTIMPLEMENTED();
+ return ThreadPriority::NORMAL;
+#else
+ // Mirrors SetCurrentThreadPriority()'s implementation.
+ ThreadPriority platform_specific_priority;
+ if (internal::GetCurrentThreadPriorityForPlatform(
+ &platform_specific_priority)) {
+ return platform_specific_priority;
+ }
+
+ // Need to clear errno before calling getpriority():
+ // http://man7.org/linux/man-pages/man2/getpriority.2.html
+ errno = 0;
+ int nice_value = getpriority(PRIO_PROCESS, 0);
+ if (errno != 0) {
+ DVPLOG(1) << "Failed to get nice value of thread ("
+ << PlatformThread::CurrentId() << ")";
+ return ThreadPriority::NORMAL;
+ }
+
+ return internal::NiceValueToThreadPriority(nice_value);
+#endif // !defined(OS_NACL)
+}
+
+#endif // !defined(OS_MACOSX) && !defined(OS_FUCHSIA)
+
+} // namespace base
