Initial checkin of gRPC to third_party/

third_party/grpc/src/core/iomgr/wakeup_fd_eventfd.c

Index: third_party/grpc/src/core/iomgr/wakeup_fd_eventfd.c
diff --git a/third_party/WebKit/public/web/modules/notifications/WebNotificationPermissionCallback.h b/third_party/grpc/src/core/iomgr/wakeup_fd_eventfd.c
similarity index 53%
copy from third_party/WebKit/public/web/modules/notifications/WebNotificationPermissionCallback.h
copy to third_party/grpc/src/core/iomgr/wakeup_fd_eventfd.c
index 0699fd7d872c6af29ee79f08128704636cd487a5..f67379e4fcfaf709bf9964e4eebd58b7e2481c13 100644
--- a/third_party/WebKit/public/web/modules/notifications/WebNotificationPermissionCallback.h
+++ b/third_party/grpc/src/core/iomgr/wakeup_fd_eventfd.c
@@ -1,5 +1,7 @@
 /*
- * Copyright (C) 2009 Google Inc. All rights reserved.
+ *
+ * Copyright 2015, 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
@@ -26,25 +28,58 @@
  * 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.
+ *
  */
 
-#ifndef WebNotificationPermissionCallback_h
-#define WebNotificationPermissionCallback_h
+#include <grpc/support/port_platform.h>
+
+#ifdef GPR_LINUX_EVENTFD
+
+#include <errno.h>
+#include <sys/eventfd.h>
+#include <unistd.h>
+
+#include <grpc/support/log.h>
+
+#include "src/core/iomgr/wakeup_fd_posix.h"
+#include "src/core/profiling/timers.h"
+
+static void eventfd_create(grpc_wakeup_fd* fd_info) {
+  int efd = eventfd(0, EFD_NONBLOCK | EFD_CLOEXEC);
+  /* TODO(klempner): Handle failure more gracefully */
+  GPR_ASSERT(efd >= 0);
+  fd_info->read_fd = efd;
+  fd_info->write_fd = -1;
+}
 
-#include "public/platform/modules/permissions/permission_status.mojom.h"
+static void eventfd_consume(grpc_wakeup_fd* fd_info) {
+  eventfd_t value;
+  int err;
+  do {
+    err = eventfd_read(fd_info->read_fd, &value);
+  } while (err < 0 && errno == EINTR);
+}
 
-namespace blink {
+static void eventfd_wakeup(grpc_wakeup_fd* fd_info) {
+  int err;
+  GPR_TIMER_BEGIN("eventfd_wakeup", 0);
+  do {
+    err = eventfd_write(fd_info->read_fd, 1);
+  } while (err < 0 && errno == EINTR);
+  GPR_TIMER_END("eventfd_wakeup", 0);
+}
 
-// Callback object used for Web Notification permission requests.
-class WebNotificationPermissionCallback {
-public:
-    virtual ~WebNotificationPermissionCallback() { }
+static void eventfd_destroy(grpc_wakeup_fd* fd_info) {
+  if (fd_info->read_fd != 0) close(fd_info->read_fd);
+}
 
-    // Method to be invoked when the asynchronous permission request for the
-    // ability to display Web Notifications has been completed.
-    virtual void permissionRequestComplete(mojom::PermissionStatus) = 0;
-};
+static int eventfd_check_availability(void) {
+  /* TODO(klempner): Actually check if eventfd is available */
+  return 1;
+}
 
-} // namespace blink
+const grpc_wakeup_fd_vtable grpc_specialized_wakeup_fd_vtable = {
+    eventfd_create, eventfd_consume, eventfd_wakeup, eventfd_destroy,
+    eventfd_check_availability};
 
-#endif
+#endif /* GPR_LINUX_EVENTFD */