mirror of https://github.com/BOINC/boinc.git
95 lines
2.5 KiB
C
Executable File
95 lines
2.5 KiB
C
Executable File
// Berkeley Open Infrastructure for Network Computing
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// http://boinc.berkeley.edu
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// Copyright (C) 2005 University of California
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//
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// This is free software; you can redistribute it and/or
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// modify it under the terms of the GNU Lesser General Public
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// License as published by the Free Software Foundation;
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// either version 2.1 of the License, or (at your option) any later version.
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//
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// This software 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.
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// See the GNU Lesser General Public License for more details.
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//
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// To view the GNU Lesser General Public License visit
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// http://www.gnu.org/copyleft/lesser.html
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// or write to the Free Software Foundation, Inc.,
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// 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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// platform-independent interface to shared memory
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#ifndef BOINC_SHMEM_H
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#define BOINC_SHMEM_H
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#ifndef _WIN32
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#include <sys/types.h>
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#include <sys/shm.h>
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#endif
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#ifdef _WIN32
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// create a shared-memory segment of the given size.
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//
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HANDLE create_shmem(LPCTSTR seg_name, int size, void** pp, bool disable_mapview);
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// attach to a shared-memory segment
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//
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HANDLE attach_shmem(LPCTSTR seg_name, void** pp);
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// detach from a shared-mem segment.
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// Once all processes have detached, the segment is destroyed
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//
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int detach_shmem(HANDLE hSharedMem, void* p);
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#else
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#ifdef USE_FILE_MAPPED_SHMEM
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#define MMAPPED_FILE_NAME "boinc_mmap_file"
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// create a shared-memory segment of the given size.
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//
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extern int create_shmem(char *path, size_t size, void** pp);
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// attach to a shared-memory segment
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//
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int attach_shmem(char *path, void** pp);
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// detach from a shared-mem segment
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//
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extern int detach_shmem(void* p, size_t size);
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#else
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// create a shared-memory segment of the given size.
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//
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extern int create_shmem(key_t, int size, gid_t gid, void**);
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// attach to a shared-memory segment
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//
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extern int attach_shmem(key_t, void**);
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// detach from a shared-mem segment
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//
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extern int detach_shmem(void*);
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extern int shmem_info(key_t key);
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#endif
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// Destroy a shared-memory segment.
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// If there are attachments to it,
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// print a message in a loop until the attachments are gone
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//
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extern int destroy_shmem(key_t);
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#ifndef __EMX__
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// For testing on Apple, Linux, UNIX systems with limited number
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// of shared memory segments per process and / or system-wide
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void stress_shmem(short reduce_by);
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#endif
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#endif // !defined(_WIN32)
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#endif // BOINC_SHMEM_H
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