Port the Thread class properly to Mac and Linux. This involved porting

PlatformThread and creating an API on PlatformThread to create a native thread
and later join with it.  I also made a few other tweaks to PlatformThread, such
as eliminating the Current() method which appears to be unused.  The
operator==() is also unused, so I killed it as well.

I made a few other miscellaneous cleanups and adjustments.


git-svn-id: svn://svn.chromium.org/chrome/trunk/src@1146 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 114 insertions, 0 deletions

diff --git a/base/platform_thread_win.cc b/base/platform_thread_win.cc
new file mode 100644
index 0000000..e261c25
--- /dev/null
+++ b/base/platform_thread_win.cc
@@ -0,0 +1,114 @@
+// Copyright 2008, Google Inc.
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//    * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//    * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//    * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+#include "base/platform_thread.h"
+
+#include <process.h>
+
+#include "base/logging.h"
+#include "base/win_util.h"
+
+namespace {
+
+// The information on how to set the thread name comes from
+// a MSDN article: http://msdn2.microsoft.com/en-us/library/xcb2z8hs.aspx
+const DWORD kVCThreadNameException = 0x406D1388;
+
+typedef struct tagTHREADNAME_INFO {
+  DWORD dwType;  // Must be 0x1000.
+  LPCSTR szName;  // Pointer to name (in user addr space).
+  DWORD dwThreadID;  // Thread ID (-1=caller thread).
+  DWORD dwFlags;  // Reserved for future use, must be zero.
+} THREADNAME_INFO;
+
+unsigned __stdcall ThreadFunc(void* closure) {
+  PlatformThread::Delegate* delegate =
+      static_cast<PlatformThread::Delegate*>(closure);
+  delegate->ThreadMain(); 
+  return NULL;
+}
+
+}  // namespace
+
+// static
+int PlatformThread::CurrentId() {
+  return GetCurrentThreadId();
+}
+
+// static
+void PlatformThread::YieldCurrentThread() {
+  ::Sleep(0);
+}
+
+// static
+void PlatformThread::Sleep(int duration_ms) {
+  ::Sleep(duration_ms);
+}
+
+// static
+void PlatformThread::SetName(int thread_id, const char* name) {
+  THREADNAME_INFO info;
+  info.dwType = 0x1000;
+  info.szName = name;
+  info.dwThreadID = thread_id;
+  info.dwFlags = 0;
+
+  __try {
+    RaiseException(kVCThreadNameException, 0, sizeof(info)/sizeof(DWORD),
+                   reinterpret_cast<DWORD_PTR*>(&info));
+  } __except(EXCEPTION_CONTINUE_EXECUTION) {
+  }
+}
+
+// static
+bool PlatformThread::Create(size_t stack_size, Delegate* delegate,
+                            PlatformThreadHandle* thread_handle) {
+  unsigned int flags = 0;
+  if (stack_size > 0 && win_util::GetWinVersion() >= win_util::WINVERSION_XP) {
+    flags = STACK_SIZE_PARAM_IS_A_RESERVATION;
+  } else {
+    stack_size = 0;
+  }
+
+  *thread_handle = reinterpret_cast<PlatformThreadHandle>(_beginthreadex(
+      NULL, stack_size, ThreadFunc, delegate, flags, NULL));
+  return *thread_handle != NULL;
+}
+
+// static
+void PlatformThread::Join(PlatformThreadHandle thread_handle) {
+  DCHECK(thread_handle);
+
+  // Wait for the thread to exit.  It should already have terminated but make
+  // sure this assumption is valid.
+  DWORD result = WaitForSingleObject(thread_handle, INFINITE);
+  DCHECK_EQ(WAIT_OBJECT_0, result);
+
+  CloseHandle(thread_handle);
+}