adae78ea99
ae6c262 Merge branch 'leveldb' into ripple-fork 28fa222 Looks like a bit more delay is needed to smooth the latency. a18f3e6 Tidy up JobQueue, add ripple_core module ab82e57 Release leveldb 1.12 02c6259 Release leveldb 1.11 5bbb544 Rate limit compactions with a 25ms pause after each complete file. 8c29c47 LevelDB issue 178 fix: cannot resize a level 0 compaction set 18b245c Added GNU/kFreeBSD kernel name (TARGET_OS) 8be9d12 CondVar::SignalAll was broken, leading to deadlocks on Windows builds. http://code.google.com/p/leveldb/issues/detail?id=149 c9fc070 Upgrade LevelDB to 1.10.0, mostly for better write stall logging. 8215b15 Tweak to variable name to support unity build git-subtree-dir: src/leveldb git-subtree-split: ae6c2620b2ef3d5c69e63dc0eda865d6a39fa061
147 lines
3.9 KiB
C++
147 lines
3.9 KiB
C++
// 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() :
|
|
cs_(NULL) {
|
|
assert(!cs_);
|
|
cs_ = static_cast<void *>(new CRITICAL_SECTION());
|
|
::InitializeCriticalSection(static_cast<CRITICAL_SECTION *>(cs_));
|
|
assert(cs_);
|
|
}
|
|
|
|
Mutex::~Mutex() {
|
|
assert(cs_);
|
|
::DeleteCriticalSection(static_cast<CRITICAL_SECTION *>(cs_));
|
|
delete static_cast<CRITICAL_SECTION *>(cs_);
|
|
cs_ = NULL;
|
|
assert(!cs_);
|
|
}
|
|
|
|
void Mutex::Lock() {
|
|
assert(cs_);
|
|
::EnterCriticalSection(static_cast<CRITICAL_SECTION *>(cs_));
|
|
}
|
|
|
|
void Mutex::Unlock() {
|
|
assert(cs_);
|
|
::LeaveCriticalSection(static_cast<CRITICAL_SECTION *>(cs_));
|
|
}
|
|
|
|
void Mutex::AssertHeld() {
|
|
assert(cs_);
|
|
assert(1);
|
|
}
|
|
|
|
CondVar::CondVar(Mutex* mu) :
|
|
waiting_(0),
|
|
mu_(mu),
|
|
sem1_(::CreateSemaphore(NULL, 0, 10000, NULL)),
|
|
sem2_(::CreateSemaphore(NULL, 0, 10000, NULL)) {
|
|
assert(mu_);
|
|
}
|
|
|
|
CondVar::~CondVar() {
|
|
::CloseHandle(sem1_);
|
|
::CloseHandle(sem2_);
|
|
}
|
|
|
|
void CondVar::Wait() {
|
|
mu_->AssertHeld();
|
|
|
|
wait_mtx_.Lock();
|
|
++waiting_;
|
|
wait_mtx_.Unlock();
|
|
|
|
mu_->Unlock();
|
|
|
|
// initiate handshake
|
|
::WaitForSingleObject(sem1_, INFINITE);
|
|
::ReleaseSemaphore(sem2_, 1, NULL);
|
|
mu_->Lock();
|
|
}
|
|
|
|
void CondVar::Signal() {
|
|
wait_mtx_.Lock();
|
|
if (waiting_ > 0) {
|
|
--waiting_;
|
|
|
|
// finalize handshake
|
|
::ReleaseSemaphore(sem1_, 1, NULL);
|
|
::WaitForSingleObject(sem2_, INFINITE);
|
|
}
|
|
wait_mtx_.Unlock();
|
|
}
|
|
|
|
void CondVar::SignalAll() {
|
|
wait_mtx_.Lock();
|
|
::ReleaseSemaphore(sem1_, waiting_, NULL);
|
|
while(waiting_ > 0) {
|
|
--waiting_;
|
|
::WaitForSingleObject(sem2_, INFINITE);
|
|
}
|
|
wait_mtx_.Unlock();
|
|
}
|
|
|
|
AtomicPointer::AtomicPointer(void* v) {
|
|
Release_Store(v);
|
|
}
|
|
|
|
void InitOnce(OnceType* once, void (*initializer)()) {
|
|
once->InitOnce(initializer);
|
|
}
|
|
|
|
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;
|
|
}
|
|
|
|
}
|
|
}
|