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/*
* shmem.cpp
*
* Created on: August 13, 2009
* Author: Ben Langmead
*/
#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
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