www.pudn.com > allocator.rar > shm_unlink.cc
// file: shm_unlink.cc
// author: Marc Bumble
// April 29, 2003
// Page memory source for shared memory
// Copyright (C) 2003 by Marc D. Bumble
// This program 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 2
// of the License, or (at your option) any later version.
// This program 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 this program; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
extern "C" {
// #include <sys/types.h>
#include <unistd.h> /* POSIX et al */
#include <sys/mman.h>
#include <fcntl.h> // for O_RDWR | O_CREAT | O_TRUNC
}
#include <iostream>
#include <fstream> // for std::ofstream to()
#include <sstream> // string stream for stringstream
#include <pooled_allocator.h>
char key_val_1[] = "/allocate_key"; // needs a leading slash, see manpage.
char key_val_2[] = "/allocate_key2"; // used in Pool test
int main(int argc, char** argv) {
for (int proj_id=0; proj_id <=5; proj_id++) {
// create the shared segment key
std::stringstream alloc_key_ss;
alloc_key_ss << key_val_1 << "_" << proj_id;
// unlink shared memory
int result = shm_unlink(alloc_key_ss.str().data());
// if (errno!=ENOENT) {
if (!result) {
std::clog << "shm_unlink released " << alloc_key_ss.str() << std::endl;
std::clog << "Status: " << __FILE__ << ':' << __LINE__ ;
std::clog << ": shared memory shm_unlink: " << strerror(errno) <<
": " << alloc_key_ss.str().data() << std::endl;
}
} // for (int i=0; i <=127; i++)
for (int proj_id=0; proj_id <=5; proj_id++) {
// create the shared segment key
std::stringstream alloc_key_ss;
alloc_key_ss << key_val_2 << "_" << proj_id;
// unlink shared memory
int result = shm_unlink(alloc_key_ss.str().data());
// if (errno!=ENOENT) {
if (!result) {
std::clog << "shm_unlink released " << alloc_key_ss.str() << std::endl;
std::clog << "Status: " << __FILE__ << ':' << __LINE__ ;
std::clog << ": shared memory shm_unlink: " << strerror(errno) <<
": " << alloc_key_ss.str().data() << std::endl;
}
} // for (int i=0; i <=127; i++)
return 0;
}