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Diffstat (limited to 'src/leveldb/port/port_posix.cc')
-rw-r--r-- | src/leveldb/port/port_posix.cc | 67 |
1 files changed, 67 insertions, 0 deletions
diff --git a/src/leveldb/port/port_posix.cc b/src/leveldb/port/port_posix.cc new file mode 100644 index 0000000000..ec39e92195 --- /dev/null +++ b/src/leveldb/port/port_posix.cc @@ -0,0 +1,67 @@ +// Copyright (c) 2011 The LevelDB Authors. All rights reserved. +// Use of this source code is governed by a BSD-style license that can be +// found in the LICENSE file. See the AUTHORS file for names of contributors. + +#include "port/port_posix.h" + +#include <cstdlib> +#include <stdio.h> +#include <string.h> + +#if (defined(__x86_64__) || defined(__i386__)) && defined(__GNUC__) +#include <cpuid.h> +#endif + +namespace leveldb { +namespace port { + +static void PthreadCall(const char* label, int result) { + if (result != 0) { + fprintf(stderr, "pthread %s: %s\n", label, strerror(result)); + abort(); + } +} + +Mutex::Mutex() { PthreadCall("init mutex", pthread_mutex_init(&mu_, NULL)); } + +Mutex::~Mutex() { PthreadCall("destroy mutex", pthread_mutex_destroy(&mu_)); } + +void Mutex::Lock() { PthreadCall("lock", pthread_mutex_lock(&mu_)); } + +void Mutex::Unlock() { PthreadCall("unlock", pthread_mutex_unlock(&mu_)); } + +CondVar::CondVar(Mutex* mu) + : mu_(mu) { + PthreadCall("init cv", pthread_cond_init(&cv_, NULL)); +} + +CondVar::~CondVar() { PthreadCall("destroy cv", pthread_cond_destroy(&cv_)); } + +void CondVar::Wait() { + PthreadCall("wait", pthread_cond_wait(&cv_, &mu_->mu_)); +} + +void CondVar::Signal() { + PthreadCall("signal", pthread_cond_signal(&cv_)); +} + +void CondVar::SignalAll() { + PthreadCall("broadcast", pthread_cond_broadcast(&cv_)); +} + +void InitOnce(OnceType* once, void (*initializer)()) { + PthreadCall("once", pthread_once(once, initializer)); +} + +bool HasAcceleratedCRC32C() { +#if (defined(__x86_64__) || defined(__i386__)) && defined(__GNUC__) + unsigned int eax, ebx, ecx, edx; + __get_cpuid(1, &eax, &ebx, &ecx, &edx); + return (ecx & (1 << 20)) != 0; +#else + return false; +#endif +} + +} // namespace port +} // namespace leveldb |