1 files changed, 56 insertions, 0 deletions
diff --git a/src/core/eventmanager/em_posix.c b/src/core/eventmanager/em_posix.c
new file mode 100644
index 0000000000..af449342f0
--- /dev/null
+++ b/src/core/eventmanager/em_posix.c
@@ -0,0 +1,56 @@
+/*
+ *
+ * Copyright 2014, 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.
+ *
+ */
+
+/* Posix grpc event manager support code. */
+#include <grpc/support/log.h>
+#include <grpc/support/sync.h>
+#include <event2/thread.h>
+
+static int error_code = 0;
+static gpr_once threads_once = GPR_ONCE_INIT;
+static void evthread_threads_initialize(void) {
+  error_code = evthread_use_pthreads();
+  if (error_code) {
+    gpr_log(GPR_ERROR, "Failed to initialize libevent thread support!");
+  }
+}
+
+/* Notify LibEvent that Posix pthread is used. */
+int evthread_use_threads() {
+  gpr_once_init(&threads_once, &evthread_threads_initialize);
+  /* For Pthreads or Windows threads, Libevent provides simple APIs to set
+     mutexes and conditional variables to support cross thread operations.
+     For other platforms, LibEvent provide callback APIs to hook mutexes and
+     conditional variables. */
+  return error_code;
+}