Initial checkin of gRPC to third_party/

third_party/grpc/include/grpc/impl/codegen/atm_win32.h

Index: third_party/grpc/include/grpc/impl/codegen/atm_win32.h
diff --git a/third_party/grpc/include/grpc/impl/codegen/atm_win32.h b/third_party/grpc/include/grpc/impl/codegen/atm_win32.h
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index 0000000000000000000000000000000000000000..9d26462d84f86e055f593cb86b271fc2ebfa7f1f
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+++ b/third_party/grpc/include/grpc/impl/codegen/atm_win32.h
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+/*
+ *
+ * Copyright 2015-2016, 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_IMPL_CODEGEN_ATM_WIN32_H
+#define GRPC_IMPL_CODEGEN_ATM_WIN32_H
+
+/* Win32 variant of atm_platform.h */
+#include <grpc/impl/codegen/port_platform.h>
+
+typedef intptr_t gpr_atm;
+
+#define gpr_atm_full_barrier MemoryBarrier
+
+static __inline gpr_atm gpr_atm_acq_load(const gpr_atm *p) {
+  gpr_atm result = *p;
+  gpr_atm_full_barrier();
+  return result;
+}
+
+static __inline gpr_atm gpr_atm_no_barrier_load(const gpr_atm *p) {
+  /* TODO(dklempner): Can we implement something better here? */
+  return gpr_atm_acq_load(p);
+}
+
+static __inline void gpr_atm_rel_store(gpr_atm *p, gpr_atm value) {
+  gpr_atm_full_barrier();
+  *p = value;
+}
+
+static __inline void gpr_atm_no_barrier_store(gpr_atm *p, gpr_atm value) {
+  /* TODO(ctiller): Can we implement something better here? */
+  gpr_atm_rel_store(p, value);
+}
+
+static __inline int gpr_atm_no_barrier_cas(gpr_atm *p, gpr_atm o, gpr_atm n) {
+/* InterlockedCompareExchangePointerNoFence() not available on vista or
+   windows7 */
+#ifdef GPR_ARCH_64
+  return o == (gpr_atm)InterlockedCompareExchangeAcquire64(
+                  (volatile LONGLONG *)p, (LONGLONG)n, (LONGLONG)o);
+#else
+  return o == (gpr_atm)InterlockedCompareExchangeAcquire((volatile LONG *)p,
+                                                         (LONG)n, (LONG)o);
+#endif
+}
+
+static __inline int gpr_atm_acq_cas(gpr_atm *p, gpr_atm o, gpr_atm n) {
+#ifdef GPR_ARCH_64
+  return o == (gpr_atm)InterlockedCompareExchangeAcquire64(
+                  (volatile LONGLONG *)p, (LONGLONG)n, (LONGLONG)o);
+#else
+  return o == (gpr_atm)InterlockedCompareExchangeAcquire((volatile LONG *)p,
+                                                         (LONG)n, (LONG)o);
+#endif
+}
+
+static __inline int gpr_atm_rel_cas(gpr_atm *p, gpr_atm o, gpr_atm n) {
+#ifdef GPR_ARCH_64
+  return o == (gpr_atm)InterlockedCompareExchangeRelease64(
+                  (volatile LONGLONG *)p, (LONGLONG)n, (LONGLONG)o);
+#else
+  return o == (gpr_atm)InterlockedCompareExchangeRelease((volatile LONG *)p,
+                                                         (LONG)n, (LONG)o);
+#endif
+}
+
+static __inline gpr_atm gpr_atm_no_barrier_fetch_add(gpr_atm *p,
+                                                     gpr_atm delta) {
+  /* Use the CAS operation to get pointer-sized fetch and add */
+  gpr_atm old;
+  do {
+    old = *p;
+  } while (!gpr_atm_no_barrier_cas(p, old, old + delta));
+  return old;
+}
+
+static __inline gpr_atm gpr_atm_full_fetch_add(gpr_atm *p, gpr_atm delta) {
+  /* Use a CAS operation to get pointer-sized fetch and add */
+  gpr_atm old;
+#ifdef GPR_ARCH_64
+  do {
+    old = *p;
+  } while (old != (gpr_atm)InterlockedCompareExchange64((volatile LONGLONG *)p,
+                                                        (LONGLONG)old + delta,
+                                                        (LONGLONG)old));
+#else
+  do {
+    old = *p;
+  } while (old != (gpr_atm)InterlockedCompareExchange(
+                      (volatile LONG *)p, (LONG)old + delta, (LONG)old));
+#endif
+  return old;
+}
+
+#endif /* GRPC_IMPL_CODEGEN_ATM_WIN32_H */