mirror of
https://github.com/EQEmu/Server.git
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121 lines
2.9 KiB
C++
121 lines
2.9 KiB
C++
/* EQEMu: Everquest Server Emulator
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Copyright (C) 2001-2013 EQEMu Development Team (http://eqemulator.net)
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; version 2 of the License.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY except by those people which sell it, which
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are required to give you total support for your newly bought product;
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without even the implied warranty of MERCHANTABILITY or FITNESS FOR
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A PARTICULAR PURPOSE. See the GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include "ipc_mutex.h"
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#ifdef _WINDOWS
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#include <Windows.h>
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#else
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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#include <unistd.h>
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#endif
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#include "types.h"
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#include "eqemu_exception.h"
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namespace EQEmu {
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struct IPCMutex::Implementation {
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#ifdef _WINDOWS
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HANDLE mut_;
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#else
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int fd_;
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#endif
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};
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IPCMutex::IPCMutex(std::string name) : locked_(false) {
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imp_ = new Implementation;
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#ifdef _WINDOWS
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std::string final_name = "EQEmuMutex_";
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final_name += name;
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imp_->mut_ = CreateMutex(NULL,
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FALSE,
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final_name.c_str());
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if(!imp_->mut_) {
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EQ_EXCEPT("IPC Mutex", "Could not create mutex.");
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}
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#else
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std::string final_name = name;
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final_name += ".lock";
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imp_->fd_ = open(final_name.c_str(),
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O_RDWR | O_CREAT | O_CLOEXEC,
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S_IRUSR | S_IWUSR);
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if(imp_->fd_ == -1) {
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EQ_EXCEPT("IPC Mutex", "Could not create mutex.");
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}
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#endif
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}
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IPCMutex::~IPCMutex() {
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#ifdef _WINDOWS
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if(locked_) {
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ReleaseMutex(imp_->mut_);
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}
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CloseHandle(imp_->mut_);
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#else
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if(locked_) {
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lockf(imp_->fd_, F_ULOCK, 0);
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}
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close(imp_->fd_);
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#endif
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delete imp_;
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}
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bool IPCMutex::Lock() {
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if(locked_) {
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return false;
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}
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#ifdef _WINDOWS
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DWORD wait_result = WaitForSingleObject(imp_->mut_, INFINITE);
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if(wait_result != WAIT_OBJECT_0) {
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return false;
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}
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#else
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if(lockf(imp_->fd_, F_LOCK, 0) != 0) {
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return false;
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}
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#endif
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locked_ = true;
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return true;
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}
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bool IPCMutex::Unlock() {
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if(!locked_) {
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return false;
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}
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#ifdef _WINDOWS
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if(!ReleaseMutex(imp_->mut_)) {
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return false;
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}
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#else
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if(lockf(imp_->fd_, F_ULOCK, 0) != 0) {
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return false;
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}
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#endif
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locked_ = false;
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return true;
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}
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}
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