heyongqiang
13 years ago
parent
6fee5a74f5
commit
a4f9b8b49e
@ -1,64 +0,0 @@ |
||||
// 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_android.h" |
||||
|
||||
#include <cstdlib> |
||||
|
||||
extern "C" { |
||||
size_t fread_unlocked(void *a, size_t b, size_t c, FILE *d) { |
||||
return fread(a, b, c, d); |
||||
} |
||||
|
||||
size_t fwrite_unlocked(const void *a, size_t b, size_t c, FILE *d) { |
||||
return fwrite(a, b, c, d); |
||||
} |
||||
|
||||
int fflush_unlocked(FILE *f) { |
||||
return fflush(f); |
||||
} |
||||
|
||||
int fdatasync(int fd) { |
||||
return fsync(fd); |
||||
} |
||||
} |
||||
|
||||
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_)); |
||||
} |
||||
|
||||
} // namespace port
|
||||
} // namespace leveldb
|
||||
@ -1,180 +0,0 @@ |
||||
// 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_ANDROID_H_ |
||||
#define STORAGE_LEVELDB_PORT_PORT_ANDROID_H_ |
||||
|
||||
#include <endian.h> |
||||
#include <pthread.h> |
||||
#include <stdint.h> |
||||
#include <unistd.h> |
||||
#include <string> |
||||
#include <cctype> |
||||
|
||||
// Collapse the plethora of ARM flavors available to an easier to manage set
|
||||
// Defs reference is at https://wiki.edubuntu.org/ARM/Thumb2PortingHowto
|
||||
#if defined(__ARM_ARCH_6__) || \ |
||||
defined(__ARM_ARCH_6J__) || \
|
||||
defined(__ARM_ARCH_6K__) || \
|
||||
defined(__ARM_ARCH_6Z__) || \
|
||||
defined(__ARM_ARCH_6T2__) || \
|
||||
defined(__ARM_ARCH_6ZK__) || \
|
||||
defined(__ARM_ARCH_7__) || \
|
||||
defined(__ARM_ARCH_7R__) || \
|
||||
defined(__ARM_ARCH_7A__) |
||||
#define ARMV6_OR_7 1 |
||||
#endif |
||||
|
||||
extern "C" { |
||||
size_t fread_unlocked(void *a, size_t b, size_t c, FILE *d); |
||||
size_t fwrite_unlocked(const void *a, size_t b, size_t c, FILE *d); |
||||
int fflush_unlocked(FILE *f); |
||||
int fdatasync (int fd); |
||||
} |
||||
|
||||
namespace leveldb { |
||||
namespace port { |
||||
|
||||
static const bool kLittleEndian = __BYTE_ORDER == __LITTLE_ENDIAN; |
||||
|
||||
class CondVar; |
||||
|
||||
class Mutex { |
||||
public: |
||||
Mutex(); |
||||
~Mutex(); |
||||
|
||||
void Lock(); |
||||
void Unlock(); |
||||
void AssertHeld() { |
||||
//TODO(gabor): How can I implement this?
|
||||
} |
||||
|
||||
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: |
||||
Mutex* mu_; |
||||
pthread_cond_t cv_; |
||||
}; |
||||
|
||||
#ifndef ARMV6_OR_7 |
||||
// On ARM chipsets <V6, 0xffff0fa0 is the hard coded address of a
|
||||
// memory barrier function provided by the kernel.
|
||||
typedef void (*LinuxKernelMemoryBarrierFunc)(void); |
||||
// TODO(user): ATTRIBUTE_WEAK is undefined, so this fails to build on
|
||||
// non-ARMV6_OR_7. We may be able to replace it with __attribute__((weak)) for
|
||||
// older ARM builds, but x86 builds will require a different memory barrier.
|
||||
LinuxKernelMemoryBarrierFunc pLinuxKernelMemoryBarrier ATTRIBUTE_WEAK = |
||||
(LinuxKernelMemoryBarrierFunc) 0xffff0fa0; |
||||
#endif |
||||
|
||||
// Storage for a lock-free pointer
|
||||
class AtomicPointer { |
||||
private: |
||||
void* rep_; |
||||
|
||||
inline void MemoryBarrier() const { |
||||
// TODO(gabor): This only works on Android instruction sets >= V6
|
||||
#ifdef ARMV6_OR_7 |
||||
__asm__ __volatile__("dmb" : : : "memory"); |
||||
#else |
||||
pLinuxKernelMemoryBarrier(); |
||||
#endif |
||||
} |
||||
|
||||
public: |
||||
AtomicPointer() { } |
||||
explicit AtomicPointer(void* v) : rep_(v) { } |
||||
inline void* Acquire_Load() const { |
||||
void* r = rep_; |
||||
MemoryBarrier(); |
||||
return r; |
||||
} |
||||
inline void Release_Store(void* v) { |
||||
MemoryBarrier(); |
||||
rep_ = v; |
||||
} |
||||
inline void* NoBarrier_Load() const { |
||||
void* r = rep_; |
||||
return r; |
||||
} |
||||
inline void NoBarrier_Store(void* v) { |
||||
rep_ = v; |
||||
} |
||||
}; |
||||
|
||||
// TODO(gabor): Implement compress
|
||||
inline bool Snappy_Compress( |
||||
const char* input, |
||||
size_t input_length, |
||||
std::string* output) { |
||||
return false; |
||||
} |
||||
|
||||
// TODO(gabor): Implement uncompress
|
||||
inline bool Snappy_GetUncompressedLength(const char* input, size_t length, |
||||
size_t* result) { |
||||
return false; |
||||
} |
||||
|
||||
// TODO(gabor): Implement uncompress
|
||||
inline bool Snappy_Uncompress( |
||||
const char* input_data, |
||||
size_t input_length, |
||||
char* output) { |
||||
return false; |
||||
} |
||||
|
||||
inline bool Zlib_Compress(const char* input, size_t length, |
||||
::std::string* output, int windowBits = 15, int level = -1, |
||||
int strategy = 0) { |
||||
return false; |
||||
} |
||||
|
||||
inline char* Zlib_Uncompress(const char* input_data, size_t input_length, |
||||
int* decompress_size, int windowBits = 15) { |
||||
return false; |
||||
} |
||||
|
||||
inline bool BZip2_Compress(const char* input, size_t length, |
||||
::std::string* output) { |
||||
return false; |
||||
} |
||||
|
||||
inline char* BZip2_Uncompress( const char* input_data, size_t input_length, |
||||
int* decompress_size) { |
||||
return false; |
||||
} |
||||
|
||||
inline uint64_t ThreadIdentifier() { |
||||
pthread_t tid = pthread_self(); |
||||
uint64_t r = 0; |
||||
memcpy(&r, &tid, sizeof(r) < sizeof(tid) ? sizeof(r) : sizeof(tid)); |
||||
return r; |
||||
} |
||||
|
||||
inline bool GetHeapProfile(void (*func)(void*, const char*, int), void* arg) { |
||||
return false; |
||||
} |
||||
|
||||
} // namespace port
|
||||
} // namespace leveldb
|
||||
|
||||
#endif // STORAGE_LEVELDB_PORT_PORT_ANDROID_H_
|
||||
Loading…
Reference in new issue