Built motion from commit 6a09e18b.|2.6.11

[motion2.git] / legacy-libs / grpc-cloned / deps / grpc / include / grpc / impl / codegen / atm_gcc_sync.h

diff --git a/legacy-libs/grpc-cloned/deps/grpc/include/grpc/impl/codegen/atm_gcc_sync.h b/legacy-libs/grpc-cloned/deps/grpc/include/grpc/impl/codegen/atm_gcc_sync.h
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+++ b/legacy-libs/grpc-cloned/deps/grpc/include/grpc/impl/codegen/atm_gcc_sync.h
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+/*
+ *
+ * Copyright 2015 gRPC authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ */
+
+#ifndef GRPC_IMPL_CODEGEN_ATM_GCC_SYNC_H
+#define GRPC_IMPL_CODEGEN_ATM_GCC_SYNC_H
+
+/* variant of atm_platform.h for gcc and gcc-like compiers with __sync_*
+   interface */
+#include <grpc/impl/codegen/port_platform.h>
+
+typedef intptr_t gpr_atm;
+#define GPR_ATM_MAX INTPTR_MAX
+#define GPR_ATM_MIN INTPTR_MIN
+#define GPR_ATM_INC_CAS_THEN(blah) blah
+#define GPR_ATM_INC_ADD_THEN(blah) blah
+
+#define GPR_ATM_COMPILE_BARRIER_() __asm__ __volatile__("" : : : "memory")
+
+#if defined(__i386) || defined(__x86_64__)
+/* All loads are acquire loads and all stores are release stores.  */
+#define GPR_ATM_LS_BARRIER_() GPR_ATM_COMPILE_BARRIER_()
+#else
+#define GPR_ATM_LS_BARRIER_() gpr_atm_full_barrier()
+#endif
+
+#define gpr_atm_full_barrier() (__sync_synchronize())
+
+static __inline gpr_atm gpr_atm_acq_load(const gpr_atm* p) {
+  gpr_atm value = *p;
+  GPR_ATM_LS_BARRIER_();
+  return value;
+}
+
+static __inline gpr_atm gpr_atm_no_barrier_load(const gpr_atm* p) {
+  gpr_atm value = *p;
+  GPR_ATM_COMPILE_BARRIER_();
+  return value;
+}
+
+static __inline void gpr_atm_rel_store(gpr_atm* p, gpr_atm value) {
+  GPR_ATM_LS_BARRIER_();
+  *p = value;
+}
+
+static __inline void gpr_atm_no_barrier_store(gpr_atm* p, gpr_atm value) {
+  GPR_ATM_COMPILE_BARRIER_();
+  *p = value;
+}
+
+#undef GPR_ATM_LS_BARRIER_
+#undef GPR_ATM_COMPILE_BARRIER_
+
+#define gpr_atm_no_barrier_fetch_add(p, delta) \
+  gpr_atm_full_fetch_add((p), (delta))
+#define gpr_atm_full_fetch_add(p, delta) (__sync_fetch_and_add((p), (delta)))
+
+#define gpr_atm_no_barrier_cas(p, o, n) gpr_atm_acq_cas((p), (o), (n))
+#define gpr_atm_acq_cas(p, o, n) (__sync_bool_compare_and_swap((p), (o), (n)))
+#define gpr_atm_rel_cas(p, o, n) gpr_atm_acq_cas((p), (o), (n))
+#define gpr_atm_full_cas(p, o, n) gpr_atm_acq_cas((p), (o), (n))
+
+static __inline gpr_atm gpr_atm_full_xchg(gpr_atm* p, gpr_atm n) {
+  gpr_atm cur;
+  do {
+    cur = gpr_atm_acq_load(p);
+  } while (!gpr_atm_rel_cas(p, cur, n));
+  return cur;
+}
+
+#endif /* GRPC_IMPL_CODEGEN_ATM_GCC_SYNC_H */