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