forked from enlightenment/efl
88 lines
1.6 KiB
C
88 lines
1.6 KiB
C
#ifdef HAVE_CONFIG_H
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# include <config.h>
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#endif
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#include <stdio.h>
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#include <stdlib.h>
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#include <sys/types.h>
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#include <unistd.h>
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#include <math.h>
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#include <netinet/in.h>
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#include <time.h>
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#include <sys/mman.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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#include <string.h>
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#include <zlib.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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int shm_fd = -1;
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static int shm_size = 0;
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void *shm_addr = NULL;
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char *shmfile = NULL;
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void
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shm_alloc(unsigned long dsize)
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{
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#ifdef HAVE_SHM_OPEN
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if (!shmfile) shmfile = malloc(1024);
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if (!shmfile) goto failed;
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shmfile[0] = 0;
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srand(time(NULL));
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do
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{
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snprintf(shmfile, 1024, "/evas-loader.%i.%i",
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(int)getpid(), (int)rand());
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shm_fd = shm_open(shmfile, O_RDWR | O_CREAT | O_EXCL, S_IRUSR | S_IWUSR);
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}
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while (shm_fd < 0);
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if (ftruncate(shm_fd, dsize) < 0)
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{
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close(shm_fd);
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shm_unlink(shmfile);
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shm_fd = -1;
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goto failed;
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}
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shm_addr = mmap(NULL, dsize, PROT_READ | PROT_WRITE, MAP_SHARED, shm_fd, 0);
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if (shm_addr == MAP_FAILED)
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{
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close(shm_fd);
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shm_unlink(shmfile);
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shm_fd = -1;
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goto failed;
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}
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shm_size = dsize;
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return;
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failed:
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#endif
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shm_addr = malloc(dsize);
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}
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void
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shm_free(void)
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{
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#ifdef HAVE_SHM_OPEN
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if (shm_fd >= 0)
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{
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munmap(shm_addr, shm_size);
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close(shm_fd);
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shm_fd = -1;
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shm_addr = NULL;
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if (shmfile) free(shmfile);
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shmfile = NULL;
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return;
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}
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#endif
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free(shm_addr);
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shm_addr = NULL;
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shm_fd = -1;
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}
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#ifdef __cplusplus
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}
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#endif
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