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Diffstat (limited to 'include/grpc/impl/codegen/atm_win32.h')
| -rw-r--r-- | include/grpc/impl/codegen/atm_win32.h | 125 |
1 files changed, 125 insertions, 0 deletions
diff --git a/include/grpc/impl/codegen/atm_win32.h b/include/grpc/impl/codegen/atm_win32.h new file mode 100644 index 0000000000..9d26462d84 --- /dev/null +++ b/include/grpc/impl/codegen/atm_win32.h @@ -0,0 +1,125 @@ +/* + * + * 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 */ |