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Diffstat (limited to 'src/leveldb/port/port_win.h')
| -rw-r--r-- | src/leveldb/port/port_win.h | 184 |
1 files changed, 0 insertions, 184 deletions
diff --git a/src/leveldb/port/port_win.h b/src/leveldb/port/port_win.h deleted file mode 100644 index 989c15cd91..0000000000 --- a/src/leveldb/port/port_win.h +++ /dev/null @@ -1,184 +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 -#if !(_MSC_VER >= 1900) -#define snprintf _snprintf -#endif -#define close _close -#define fread_unlocked _fread_nolock -#ifdef _WIN64 -#define ssize_t int64_t -#else -#define ssize_t int32_t -#endif -#endif - -#include <string> -#include <stdint.h> -#ifdef SNAPPY -#include <snappy.h> -#endif - -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 - // we use opaque void * to avoid including windows.h in port_win.h - void * cs_; - - // 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 Andrew D. Birrell in 2003 -class CondVar { - public: - explicit CondVar(Mutex* mu); - ~CondVar(); - void Wait(); - void Signal(); - void SignalAll(); - private: - Mutex* mu_; - - Mutex wait_mtx_; - long waiting_; - - void * sem1_; - void * sem2_; - - -}; - -class OnceType { -public: -// OnceType() : init_(false) {} - OnceType(const OnceType &once) : init_(once.init_) {} - OnceType(bool f) : init_(f) {} - void InitOnce(void (*initializer)()) { - mutex_.Lock(); - if (!init_) { - init_ = true; - initializer(); - } - mutex_.Unlock(); - } - -private: - bool init_; - Mutex mutex_; -}; - -#define LEVELDB_ONCE_INIT false -extern void InitOnce(port::OnceType*, void (*initializer)()); - -// 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); -}; - -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; -} - -bool HasAcceleratedCRC32C(); -uint32_t AcceleratedCRC32C(uint32_t crc, const char* buf, size_t size); - -} -} - -#endif // STORAGE_LEVELDB_PORT_PORT_WIN_H_ |