Vous ne pouvez pas sélectionner plus de 25 sujets
Les noms de sujets doivent commencer par une lettre ou un nombre, peuvent contenir des tirets ('-') et peuvent comporter jusqu'à 35 caractères.
129 lignes
2.9 KiB
129 lignes
2.9 KiB
// 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.
|
|
//
|
|
// See port_example.h for documentation for the following types/functions.
|
|
|
|
#ifndef STORAGE_LEVELDB_PORT_PORT_POSIX_H_
|
|
#define STORAGE_LEVELDB_PORT_PORT_POSIX_H_
|
|
|
|
#if defined(OS_MACOSX)
|
|
#include <machine/endian.h>
|
|
#elif defined(OS_SOLARIS)
|
|
#include <sys/isa_defs.h>
|
|
#ifdef _LITTLE_ENDIAN
|
|
#define LITTLE_ENDIAN
|
|
#else
|
|
#define BIG_ENDIAN
|
|
#endif
|
|
#elif defined(OS_FREEBSD) || defined(OS_OPENBSD) || defined(OS_NETBSD) ||\
|
|
defined(OS_DRAGONFLYBSD)
|
|
#include <sys/types.h>
|
|
#include <sys/endian.h>
|
|
#else
|
|
#include <endian.h>
|
|
#endif
|
|
#include <pthread.h>
|
|
#ifdef SNAPPY
|
|
#include <snappy.h>
|
|
#endif
|
|
#include <stdint.h>
|
|
#include <string>
|
|
#include "port/atomic_pointer.h"
|
|
|
|
#ifdef LITTLE_ENDIAN
|
|
#define IS_LITTLE_ENDIAN true
|
|
#else
|
|
#define IS_LITTLE_ENDIAN (__BYTE_ORDER == __LITTLE_ENDIAN)
|
|
#endif
|
|
|
|
#if defined(OS_MACOSX) || defined(OS_SOLARIS) || defined(OS_FREEBSD) ||\
|
|
defined(OS_NETBSD) || defined(OS_OPENBSD) || defined(OS_DRAGONFLYBSD)
|
|
// Use fread/fwrite/fflush on platforms without _unlocked variants
|
|
#define fread_unlocked fread
|
|
#define fwrite_unlocked fwrite
|
|
#define fflush_unlocked fflush
|
|
#endif
|
|
|
|
#if defined(OS_MACOSX) || defined(OS_FREEBSD) ||\
|
|
defined(OS_OPENBSD) || defined(OS_DRAGONFLYBSD)
|
|
// Use fsync() on platforms without fdatasync()
|
|
#define fdatasync fsync
|
|
#endif
|
|
|
|
namespace leveldb {
|
|
namespace port {
|
|
|
|
static const bool kLittleEndian = IS_LITTLE_ENDIAN;
|
|
|
|
class CondVar;
|
|
|
|
class Mutex {
|
|
public:
|
|
Mutex();
|
|
~Mutex();
|
|
|
|
void Lock();
|
|
void Unlock();
|
|
void AssertHeld() { }
|
|
|
|
private:
|
|
friend class CondVar;
|
|
pthread_mutex_t mu_;
|
|
|
|
// No copying
|
|
Mutex(const Mutex&);
|
|
void operator=(const Mutex&);
|
|
};
|
|
|
|
class CondVar {
|
|
public:
|
|
explicit CondVar(Mutex* mu);
|
|
~CondVar();
|
|
void Wait();
|
|
void Signal();
|
|
void SignalAll();
|
|
private:
|
|
pthread_cond_t cv_;
|
|
Mutex* mu_;
|
|
};
|
|
|
|
inline bool Snappy_Compress(const char* input, size_t length,
|
|
::std::string* output) {
|
|
#ifdef SNAPPY
|
|
output->resize(snappy::MaxCompressedLength(length));
|
|
size_t outlen;
|
|
snappy::RawCompress(input, length, &(*output)[0], &outlen);
|
|
output->resize(outlen);
|
|
return true;
|
|
#endif
|
|
|
|
return false;
|
|
}
|
|
|
|
inline bool Snappy_GetUncompressedLength(const char* input, size_t length,
|
|
size_t* result) {
|
|
#ifdef SNAPPY
|
|
return snappy::GetUncompressedLength(input, length, result);
|
|
#else
|
|
return false;
|
|
#endif
|
|
}
|
|
|
|
inline bool Snappy_Uncompress(const char* input, size_t length,
|
|
char* output) {
|
|
#ifdef SNAPPY
|
|
return snappy::RawUncompress(input, length, output);
|
|
#else
|
|
return false;
|
|
#endif
|
|
}
|
|
|
|
inline bool GetHeapProfile(void (*func)(void*, const char*, int), void* arg) {
|
|
return false;
|
|
}
|
|
|
|
} // namespace port
|
|
} // namespace leveldb
|
|
|
|
#endif // STORAGE_LEVELDB_PORT_PORT_POSIX_H_
|