/*
* Copyright 2011, Ben Langmead <langmea@cs.jhu.edu>
*
* This file is part of Bowtie 2.
*
* Bowtie 2 is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* Bowtie 2 is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with Bowtie 2. If not, see <http://www.gnu.org/licenses/>.
*/
#ifdef BOWTIE_SHARED_MEM
#include <iostream>
#include <string>
#include <unistd.h>
#include <sys/shm.h>
#include <errno.h>
#include "shmem.h"
using namespace std;
/**
* Notify other users of a shared-memory chunk that the leader has
* finished initializing it.
*/
void notifySharedMem(void *mem, size_t len) {
((volatile uint32_t*)((char*)mem + len))[0] = SHMEM_INIT;
}
/**
* Wait until the leader of a shared-memory chunk has finished
* initializing it.
*/
void waitSharedMem(void *mem, size_t len) {
while(((volatile uint32_t*)((char*)mem + len))[0] != SHMEM_INIT) {
sleep(1);
}
}
#endif