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466423b157
Use this to relax the acq_loads in some fd_posix assertions. The primary goal here is to avoid masking potential iomgr races from tsan.
71 lines
2.9 KiB
C
71 lines
2.9 KiB
C
/*
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*
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* Copyright 2015, Google Inc.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are
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* met:
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*
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following disclaimer
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* in the documentation and/or other materials provided with the
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* distribution.
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* * Neither the name of Google Inc. nor the names of its
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* contributors may be used to endorse or promote products derived from
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* this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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*/
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#ifndef GRPC_SUPPORT_ATM_GCC_ATOMIC_H
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#define GRPC_SUPPORT_ATM_GCC_ATOMIC_H
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/* atm_platform.h for gcc and gcc-like compilers with the
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__atomic_* interface. */
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#include <grpc/support/port_platform.h>
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typedef gpr_intptr gpr_atm;
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#define gpr_atm_full_barrier() (__atomic_thread_fence(__ATOMIC_SEQ_CST))
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#define gpr_atm_acq_load(p) (__atomic_load_n((p), __ATOMIC_ACQUIRE))
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#define gpr_atm_no_barrier_load(p) (__atomic_load_n((p), __ATOMIC_RELAXED))
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#define gpr_atm_rel_store(p, value) \
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(__atomic_store_n((p), (gpr_intptr)(value), __ATOMIC_RELEASE))
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#define gpr_atm_no_barrier_fetch_add(p, delta) \
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(__atomic_fetch_add((p), (gpr_intptr)(delta), __ATOMIC_RELAXED))
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#define gpr_atm_full_fetch_add(p, delta) \
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(__atomic_fetch_add((p), (gpr_intptr)(delta), __ATOMIC_ACQ_REL))
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static __inline int gpr_atm_no_barrier_cas(gpr_atm *p, gpr_atm o, gpr_atm n) {
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return __atomic_compare_exchange_n(p, &o, n, 0, __ATOMIC_RELAXED,
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__ATOMIC_RELAXED);
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}
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static __inline int gpr_atm_acq_cas(gpr_atm *p, gpr_atm o, gpr_atm n) {
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return __atomic_compare_exchange_n(p, &o, n, 0, __ATOMIC_ACQUIRE,
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__ATOMIC_RELAXED);
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}
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static __inline int gpr_atm_rel_cas(gpr_atm *p, gpr_atm o, gpr_atm n) {
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return __atomic_compare_exchange_n(p, &o, n, 0, __ATOMIC_RELEASE,
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__ATOMIC_RELAXED);
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}
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#endif /* GRPC_SUPPORT_ATM_GCC_ATOMIC_H */
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