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/*
*
* Copyright 2015, 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_WINDOWS_H
#define GRPC_IMPL_CODEGEN_ATM_WINDOWS_H
/** Win32 variant of atm_platform.h */
#include <grpc/impl/codegen/port_platform.h>
typedef intptr_t gpr_atm;
#define GPR_ATM_MAX INTPTR_MAX
#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 int gpr_atm_full_cas(gpr_atm *p, gpr_atm o, gpr_atm n) {
#ifdef GPR_ARCH_64
return o == (gpr_atm)InterlockedCompareExchange64((volatile LONGLONG *)p,
(LONGLONG)n, (LONGLONG)o);
#else
return o == (gpr_atm)InterlockedCompareExchange((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;
}
static __inline gpr_atm gpr_atm_full_xchg(gpr_atm *p, gpr_atm n) {
return (gpr_atm)InterlockedExchangePointer((PVOID *)p, (PVOID)n);
}
#endif /* GRPC_IMPL_CODEGEN_ATM_WINDOWS_H */
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