Add a cross-platform sleep API. We don't use TimeDelta

here to avoid linking to winmm.dll.

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@772 0039d316-1c4b-4281-b951-d872f2087c98

2 files changed, 21 insertions, 0 deletions

diff --git a/base/platform_thread.cc b/base/platform_thread.cc
index 6b24b3d..6668f9c 100644
--- a/base/platform_thread.cc
+++ b/base/platform_thread.cc
@@ -30,6 +30,7 @@
 #include "base/platform_thread.h"
 
 #if defined(OS_POSIX)
+#include <errno.h>
 #include <sched.h>
 #endif
 
@@ -55,6 +56,23 @@ void PlatformThread::YieldCurrentThread() {
 #endif
 }
 
+// static
+void PlatformThread::Sleep(int duration_ms) {
+#if defined(OS_WIN)
+  ::Sleep(duration_ms);
+#elif defined (OS_POSIX)
+  struct timespec sleep_time, remaining;
+  // Contains the portion of duration_ms >= 1 sec.
+  sleep_time.tv_sec = duration_ms / 1000;
+  duration_ms -= sleep_time.tv_sec * 1000;
+  // Contains the portion of duration_ms < 1 sec.
+  sleep_time.tv_nsec = duration_ms * 1000 * 1000;  // nanoseconds.
+  while (nanosleep(&sleep_time, &remaining) == -1 && errno == EINTR) {
+    sleep_time = remaining;
+  }
+#endif
+}
+
 bool PlatformThread::operator==(const PlatformThread& other_thread) {
 #if defined(OS_WIN)
   return thread_ == other_thread.thread_;
diff --git a/base/platform_thread.h b/base/platform_thread.h
index 2dca402..82f3362 100644
--- a/base/platform_thread.h
+++ b/base/platform_thread.h
@@ -52,6 +52,9 @@ class PlatformThread {
   // Yield the current thread so another thread can be scheduled.
   static void YieldCurrentThread();
 
+  // Sleeps for the specified duration (units are milliseconds).
+  static void Sleep(int duration_ms);
+
   bool operator==(const PlatformThread& other_thread);
 
  private: