Provide a cross platform sleep API.

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@749 0039d316-1c4b-4281-b951-d872f2087c98

2 files changed, 28 insertions, 0 deletions

diff --git a/base/platform_thread.cc b/base/platform_thread.cc
index 6b24b3d..4b6c34f 100644
--- a/base/platform_thread.cc
+++ b/base/platform_thread.cc
@@ -28,8 +28,10 @@
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 #include "base/platform_thread.h"
+#include "base/time.h"
 
 #if defined(OS_POSIX)
+#include <errno.h>
 #include <sched.h>
 #endif
 
@@ -55,6 +57,27 @@ void PlatformThread::YieldCurrentThread() {
 #endif
 }
 
+// static
+void PlatformThread::Sleep(TimeDelta sleep_duration) {
+#if defined(OS_WIN)
+  ::Sleep(static_cast<DWORD>(sleep_duration.InMilliseconds()));
+#elif defined(OS_POSIX)
+  struct timespec sleep_time, remaining;
+  // Contains the portion of sleep_duration >= 1 sec.
+  sleep_time.tv_sec = sleep_duration.InSeconds();
+  sleep_duration -= TimeDelta::FromSeconds(sleep_time.tv_sec);
+  // Contains the portion of sleep_duration < 1 sec.
+  sleep_time.tv_nsec = sleep_duration.InMicroseconds() *
+                       Time::kNanosecondsPerMicrosecond;
+  while (nanosleep(&sleep_time, &remaining) == -1 && errno == EINTR) {
+    // Interrupted by a signal, we'll resume sleeping for the remainder of the
+    // original duration.
+    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..4b3cb39 100644
--- a/base/platform_thread.h
+++ b/base/platform_thread.h
@@ -32,6 +32,8 @@
 
 #include "build/build_config.h"
 
+class TimeDelta;
+
 #if defined(OS_WIN)
 
 #include <windows.h>
@@ -51,6 +53,9 @@ class PlatformThread {
 
   // Yield the current thread so another thread can be scheduled.
   static void YieldCurrentThread();
+  
+  // Sleep for the specified duration.
+  static void Sleep(TimeDelta sleep_duration);
 
   bool operator==(const PlatformThread& other_thread);