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Diffstat (limited to 'include/grpc/support/atm_gcc_sync.h')
-rw-r--r-- | include/grpc/support/atm_gcc_sync.h | 69 |
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 index 0000000000..30570da540 --- /dev/null +++ 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__ */ |