git-svn-id: https://leveldb.googlecode.com/svn/trunk@35 62dab493-f737-651d-591e-8d6aee1b9529main
gabor@google.com
13 years ago
parent
f57e23351f
commit
85f0ab1975
@ -1,50 +0,0 @@ |
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// Copyright (c) 2011 The LevelDB Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file. See the AUTHORS file for names of contributors.
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#include "port_osx.h" |
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#include <cstdlib> |
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#include <stdio.h> |
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#include <string.h> |
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#include "util/logging.h" |
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namespace leveldb { |
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namespace port { |
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static void PthreadCall(const char* label, int result) { |
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if (result != 0) { |
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fprintf(stderr, "pthread %s: %s\n", label, strerror(result)); |
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abort(); |
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} |
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} |
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Mutex::Mutex() { PthreadCall("init mutex", pthread_mutex_init(&mu_, NULL)); } |
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Mutex::~Mutex() { PthreadCall("destroy mutex", pthread_mutex_destroy(&mu_)); } |
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void Mutex::Lock() { PthreadCall("lock", pthread_mutex_lock(&mu_)); } |
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void Mutex::Unlock() { PthreadCall("unlock", pthread_mutex_unlock(&mu_)); } |
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CondVar::CondVar(Mutex* mu) |
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: mu_(mu) { |
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PthreadCall("init cv", pthread_cond_init(&cv_, NULL)); |
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} |
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CondVar::~CondVar() { PthreadCall("destroy cv", pthread_cond_destroy(&cv_)); } |
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void CondVar::Wait() { |
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PthreadCall("wait", pthread_cond_wait(&cv_, &mu_->mu_)); |
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} |
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void CondVar::Signal() { |
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PthreadCall("signal", pthread_cond_signal(&cv_)); |
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} |
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void CondVar::SignalAll() { |
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PthreadCall("broadcast", pthread_cond_broadcast(&cv_)); |
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} |
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} |
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} |
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// Copyright (c) 2011 The LevelDB Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file. See the AUTHORS file for names of contributors.
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//
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// See port_example.h for documentation for the following types/functions.
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#ifndef STORAGE_LEVELDB_PORT_PORT_OSX_H_ |
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#define STORAGE_LEVELDB_PORT_PORT_OSX_H_ |
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#include <libkern/OSAtomic.h> |
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#include <machine/endian.h> |
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#include <pthread.h> |
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#include <stdint.h> |
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#include <string> |
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namespace leveldb { |
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// The following 4 methods implemented here for the benefit of env_posix.cc.
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inline size_t fread_unlocked(void *a, size_t b, size_t c, FILE *d) { |
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return fread(a, b, c, d); |
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} |
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inline size_t fwrite_unlocked(const void *a, size_t b, size_t c, FILE *d) { |
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return fwrite(a, b, c, d); |
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} |
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inline int fflush_unlocked(FILE *f) { |
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return fflush(f); |
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} |
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inline int fdatasync(int fd) { |
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return fsync(fd); |
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} |
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namespace port { |
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static const bool kLittleEndian = (__DARWIN_BYTE_ORDER == __DARWIN_LITTLE_ENDIAN); |
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// ------------------ Threading -------------------
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// A Mutex represents an exclusive lock.
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class Mutex { |
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public: |
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Mutex(); |
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~Mutex(); |
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void Lock(); |
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void Unlock(); |
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void AssertHeld() { } |
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private: |
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friend class CondVar; |
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pthread_mutex_t mu_; |
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// No copying
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Mutex(const Mutex&); |
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void operator=(const Mutex&); |
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}; |
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class CondVar { |
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public: |
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explicit CondVar(Mutex* mu); |
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~CondVar(); |
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void Wait(); |
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void Signal(); |
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void SignalAll(); |
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private: |
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pthread_cond_t cv_; |
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Mutex* mu_; |
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}; |
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inline void MemoryBarrier() { |
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#if defined(__GNUC__) && (defined(__i386__) || defined(__x86_64__)) |
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// See http://gcc.gnu.org/ml/gcc/2003-04/msg01180.html for a discussion on
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// this idiom. Also see http://en.wikipedia.org/wiki/Memory_ordering.
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__asm__ __volatile__("" : : : "memory"); |
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#else |
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OSMemoryBarrier(); |
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#endif |
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} |
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class AtomicPointer { |
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private: |
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void* ptr_; |
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public: |
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AtomicPointer() { } |
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explicit AtomicPointer(void* p) : ptr_(p) {} |
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inline void* Acquire_Load() const { |
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void* ptr = ptr_; |
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MemoryBarrier(); |
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return ptr; |
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} |
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inline void Release_Store(void* v) { |
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MemoryBarrier(); |
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ptr_ = v; |
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} |
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inline void* NoBarrier_Load() const { |
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return ptr_; |
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} |
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inline void NoBarrier_Store(void* v) { |
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ptr_ = v; |
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} |
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}; |
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inline bool Snappy_Compress(const char* input, size_t input_length, |
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std::string* output) { |
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return false; |
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} |
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inline bool Snappy_Uncompress(const char* input_data, size_t input_length, |
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std::string* output) { |
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return false; |
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} |
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inline bool GetHeapProfile(void (*func)(void*, const char*, int), void* arg) { |
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return false; |
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} |
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} |
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} |
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#endif // STORAGE_LEVELDB_PORT_PORT_OSX_H_
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