DragonX/dragonx
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases 2 Wiki Activity

Replace leveldb/ with vanilla 1.7.0

Browse Source
This commit is contained in:
Pieter Wuille
2012-12-12 02:17:17 +01:00
committed by Gavin Andresen
parent c429f2b062
commit 4786302fb9
34 changed files with 482 additions and 1217 deletions
Download Patch File Download Diff File Expand all files Collapse all files

72
src/leveldb/port/atomic_pointer.h
View File

@@ -36,6 +36,8 @@
#define ARCH_CPU_X86_FAMILY 1
#elif defined(__ARMEL__)
#define ARCH_CPU_ARM_FAMILY 1
#elif defined(__ppc__) || defined(__powerpc__) || defined(__powerpc64__)
#define ARCH_CPU_PPC_FAMILY 1
#endif
namespace leveldb {
@@ -91,6 +93,15 @@ inline void MemoryBarrier() {
}
#define LEVELDB_HAVE_MEMORY_BARRIER
// PPC
#elif defined(ARCH_CPU_PPC_FAMILY) && defined(__GNUC__)
inline void MemoryBarrier() {
// TODO for some powerpc expert: is there a cheaper suitable variant?
// Perhaps by having separate barriers for acquire and release ops.
asm volatile("sync" : : : "memory");
}
#define LEVELDB_HAVE_MEMORY_BARRIER
#endif
// AtomicPointer built using platform-specific MemoryBarrier()
@@ -136,6 +147,66 @@ class AtomicPointer {
}
};
// Atomic pointer based on sparc memory barriers
#elif defined(__sparcv9) && defined(__GNUC__)
class AtomicPointer {
private:
void* rep_;
public:
AtomicPointer() { }
explicit AtomicPointer(void* v) : rep_(v) { }
inline void* Acquire_Load() const {
void* val;
__asm__ __volatile__ (
"ldx [%[rep_]], %[val] \n\t"
"membar #LoadLoad|#LoadStore \n\t"
: [val] "=r" (val)
: [rep_] "r" (&rep_)
: "memory");
return val;
}
inline void Release_Store(void* v) {
__asm__ __volatile__ (
"membar #LoadStore|#StoreStore \n\t"
"stx %[v], [%[rep_]] \n\t"
:
: [rep_] "r" (&rep_), [v] "r" (v)
: "memory");
}
inline void* NoBarrier_Load() const { return rep_; }
inline void NoBarrier_Store(void* v) { rep_ = v; }
};
// Atomic pointer based on ia64 acq/rel
#elif defined(__ia64) && defined(__GNUC__)
class AtomicPointer {
private:
void* rep_;
public:
AtomicPointer() { }
explicit AtomicPointer(void* v) : rep_(v) { }
inline void* Acquire_Load() const {
void* val ;
__asm__ __volatile__ (
"ld8.acq %[val] = [%[rep_]] \n\t"
: [val] "=r" (val)
: [rep_] "r" (&rep_)
: "memory"
);
return val;
}
inline void Release_Store(void* v) {
__asm__ __volatile__ (
"st8.rel [%[rep_]] = %[v] \n\t"
:
: [rep_] "r" (&rep_), [v] "r" (v)
: "memory"
);
}
inline void* NoBarrier_Load() const { return rep_; }
inline void NoBarrier_Store(void* v) { rep_ = v; }
};
// We have neither MemoryBarrier(), nor <cstdatomic>
#else
#error Please implement AtomicPointer for this platform.
@@ -145,6 +216,7 @@ class AtomicPointer {
#undef LEVELDB_HAVE_MEMORY_BARRIER
#undef ARCH_CPU_X86_FAMILY
#undef ARCH_CPU_ARM_FAMILY
#undef ARCH_CPU_PPC_FAMILY
} // namespace port
} // namespace leveldb

2
src/leveldb/port/port.h
View File

@@ -14,8 +14,6 @@
# include "port/port_posix.h"
#elif defined(LEVELDB_PLATFORM_CHROMIUM)
# include "port/port_chromium.h"
#elif defined(LEVELDB_PLATFORM_WINDOWS)
# include "port/port_win.h"
#endif
#endif // STORAGE_LEVELDB_PORT_PORT_H_

182
src/leveldb/port/port_win.cc
View File

@@ -1,182 +0,0 @@
// LevelDB 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.
// 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 the University of California, Berkeley 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 REGENTS 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 REGENTS AND 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.
//
#include "port/port_win.h"
#include <windows.h>
#include <cassert>
namespace leveldb {
namespace port {
Mutex::Mutex() :
mutex_(::CreateMutex(NULL, FALSE, NULL)) {
assert(mutex_);
}
Mutex::~Mutex() {
assert(mutex_);
::CloseHandle(mutex_);
}
void Mutex::Lock() {
assert(mutex_);
::WaitForSingleObject(mutex_, INFINITE);
}
void Mutex::Unlock() {
assert(mutex_);
::ReleaseMutex(mutex_);
}
void Mutex::AssertHeld() {
assert(mutex_);
assert(1);
}
CondVar::CondVar(Mutex* mu) :
waiting_(0),
mu_(mu),
sema_(::CreateSemaphore(NULL, 0, 0x7fffffff, NULL)),
event_(::CreateEvent(NULL, FALSE, FALSE, NULL)),
broadcasted_(false){
assert(mu_);
}
CondVar::~CondVar() {
::CloseHandle(sema_);
::CloseHandle(event_);
}
void CondVar::Wait() {
wait_mtx_.Lock();
++waiting_;
assert(waiting_ > 0);
wait_mtx_.Unlock();
::SignalObjectAndWait(mu_->mutex_, sema_, INFINITE, FALSE);
wait_mtx_.Lock();
bool last = broadcasted_ && (--waiting_ == 0);
assert(waiting_ >= 0);
wait_mtx_.Unlock();
// we leave this function with the mutex held
if (last)
{
::SignalObjectAndWait(event_, mu_->mutex_, INFINITE, FALSE);
}
else
{
::WaitForSingleObject(mu_->mutex_, INFINITE);
}
}
void CondVar::Signal() {
wait_mtx_.Lock();
bool waiters = waiting_ > 0;
wait_mtx_.Unlock();
if (waiters)
{
::ReleaseSemaphore(sema_, 1, 0);
}
}
void CondVar::SignalAll() {
wait_mtx_.Lock();
broadcasted_ = (waiting_ > 0);
if (broadcasted_)
{
// release all
::ReleaseSemaphore(sema_, waiting_, 0);
wait_mtx_.Unlock();
::WaitForSingleObject(event_, INFINITE);
broadcasted_ = false;
}
else
{
wait_mtx_.Unlock();
}
}
AtomicPointer::AtomicPointer(void* v) {
Release_Store(v);
}
void* AtomicPointer::Acquire_Load() const {
void * p = NULL;
InterlockedExchangePointer(&p, rep_);
return p;
}
void AtomicPointer::Release_Store(void* v) {
InterlockedExchangePointer(&rep_, v);
}
void* AtomicPointer::NoBarrier_Load() const {
return rep_;
}
void AtomicPointer::NoBarrier_Store(void* v) {
rep_ = v;
}
enum InitializationState
{
Uninitialized = 0,
Running = 1,
Initialized = 2
};
void InitOnce(OnceType* once, void (*initializer)()) {
assert(Uninitialized == LEVELDB_ONCE_INIT);
InitializationState state = static_cast<InitializationState>(InterlockedCompareExchange(once, Running, Uninitialized));
if (state == Uninitialized) {
initializer();
*once = Initialized;
}
if (state == Running) {
while(*once != Initialized) {
Sleep(0); // yield
}
}
assert(*once == Initialized);
}
}
}

161
src/leveldb/port/port_win.h
View File

@@ -1,161 +0,0 @@
// LevelDB 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.
// 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 the University of California, Berkeley 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 REGENTS 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 REGENTS AND 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 STORAGE_LEVELDB_PORT_PORT_WIN_H_
#define STORAGE_LEVELDB_PORT_PORT_WIN_H_
#ifdef _MSC_VER
#define snprintf _snprintf
#define close _close
#define fread_unlocked _fread_nolock
#endif
#ifdef SNAPPY
#include <snappy/snappy.h>
#endif
#include <string>
#include <stdint.h>
namespace leveldb {
namespace port {
// Windows is little endian (for now :p)
static const bool kLittleEndian = true;
class CondVar;
class Mutex {
public:
Mutex();
~Mutex();
void Lock();
void Unlock();
void AssertHeld();
private:
friend class CondVar;
// critical sections are more efficient than mutexes
// but they are not recursive and can only be used to synchronize threads within the same process
// additionnaly they cannot be used with SignalObjectAndWait that we use for CondVar
// we use opaque void * to avoid including windows.h in port_win.h
void * mutex_;
// No copying
Mutex(const Mutex&);
void operator=(const Mutex&);
};
// the Win32 API offers a dependable condition variable mechanism, but only starting with
// Windows 2008 and Vista
// no matter what we will implement our own condition variable with a semaphore
// implementation as described in a paper written by Douglas C. Schmidt and Irfan Pyarali
class CondVar {
public:
explicit CondVar(Mutex* mu);
~CondVar();
void Wait();
void Signal();
void SignalAll();
private:
Mutex* mu_;
Mutex wait_mtx_;
long waiting_;
void * sema_;
void * event_;
bool broadcasted_;
};
// Storage for a lock-free pointer
class AtomicPointer {
private:
void * rep_;
public:
AtomicPointer() : rep_(NULL) { }
explicit AtomicPointer(void* v);
void* Acquire_Load() const;
void Release_Store(void* v);
void* NoBarrier_Load() const;
void NoBarrier_Store(void* v);
};
typedef volatile long OnceType;
#define LEVELDB_ONCE_INIT (0)
extern void InitOnce(OnceType* once, void (*initializer)());
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;
}
}
}
#endif // STORAGE_LEVELDB_PORT_PORT_WIN_H_

59
src/leveldb/port/thread_annotations.h Normal file
View File

@@ -0,0 +1,59 @@
// Copyright (c) 2012 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.
#ifndef STORAGE_LEVELDB_PORT_THREAD_ANNOTATIONS_H
// Some environments provide custom macros to aid in static thread-safety
// analysis. Provide empty definitions of such macros unless they are already
// defined.
#ifndef EXCLUSIVE_LOCKS_REQUIRED
#define EXCLUSIVE_LOCKS_REQUIRED(...)
#endif
#ifndef SHARED_LOCKS_REQUIRED
#define SHARED_LOCKS_REQUIRED(...)
#endif
#ifndef LOCKS_EXCLUDED
#define LOCKS_EXCLUDED(...)
#endif
#ifndef LOCK_RETURNED
#define LOCK_RETURNED(x)
#endif
#ifndef LOCKABLE
#define LOCKABLE
#endif
#ifndef SCOPED_LOCKABLE
#define SCOPED_LOCKABLE
#endif
#ifndef EXCLUSIVE_LOCK_FUNCTION
#define EXCLUSIVE_LOCK_FUNCTION(...)
#endif
#ifndef SHARED_LOCK_FUNCTION
#define SHARED_LOCK_FUNCTION(...)
#endif
#ifndef EXCLUSIVE_TRYLOCK_FUNCTION
#define EXCLUSIVE_TRYLOCK_FUNCTION(...)
#endif
#ifndef SHARED_TRYLOCK_FUNCTION
#define SHARED_TRYLOCK_FUNCTION(...)
#endif
#ifndef UNLOCK_FUNCTION
#define UNLOCK_FUNCTION(...)
#endif
#ifndef NO_THREAD_SAFETY_ANALYSIS
#define NO_THREAD_SAFETY_ANALYSIS
#endif
#endif // STORAGE_LEVELDB_PORT_THREAD_ANNOTATIONS_H