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