1 files changed, 69 insertions, 0 deletions
diff --git a/include/grpc/support/atm_gcc_sync.h b/include/grpc/support/atm_gcc_sync.h
new file mode 100644
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+++ b/include/grpc/support/atm_gcc_sync.h
@@ -0,0 +1,69 @@
+/*
+ *
+ * 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.
+ *
+ */
+
+#ifndef __GRPC_SUPPORT_ATM_GCC_SYNC_H__
+#define __GRPC_SUPPORT_ATM_GCC_SYNC_H__
+
+/* atm_platform.h for gcc and gcc-like compilers with the
+   __atomic_* interface.  */
+#include <grpc/support/port_platform.h>
+
+typedef gpr_intptr gpr_atm;
+
+#define gpr_atm_full_barrier() (__atomic_thread_fence(__ATOMIC_SEQ_CST))
+
+#define gpr_atm_acq_load(p) (__atomic_load_n((p), __ATOMIC_ACQUIRE))
+#define gpr_atm_rel_store(p, value) \
+  (__atomic_store_n((p), (gpr_intptr)(value), __ATOMIC_RELEASE))
+
+#define gpr_atm_no_barrier_fetch_add(p, delta) \
+  (__atomic_fetch_add((p), (gpr_intptr)(delta), __ATOMIC_RELAXED))
+#define gpr_atm_full_fetch_add(p, delta) \
+  (__atomic_fetch_add((p), (gpr_intptr)(delta), __ATOMIC_ACQ_REL))
+
+static __inline int gpr_atm_no_barrier_cas(gpr_atm *p, gpr_atm o, gpr_atm n) {
+  return __atomic_compare_exchange_n(p, &o, n, 0, __ATOMIC_RELAXED,
+                                     __ATOMIC_RELAXED);
+}
+
+static __inline int gpr_atm_acq_cas(gpr_atm *p, gpr_atm o, gpr_atm n) {
+  return __atomic_compare_exchange_n(p, &o, n, 0, __ATOMIC_ACQUIRE,
+                                     __ATOMIC_RELAXED);
+}
+
+static __inline int gpr_atm_rel_cas(gpr_atm *p, gpr_atm o, gpr_atm n) {
+  return __atomic_compare_exchange_n(p, &o, n, 0, __ATOMIC_RELEASE,
+                                     __ATOMIC_RELAXED);
+}
+
+#endif  /* __GRPC_SUPPORT_ATM_GCC_SYNC_H__ */