35 lines
772 B
C
35 lines
772 B
C
#include <fcntl.h>
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#include <sys/mman.h>
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#include <sys/stat.h>
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#include <unistd.h>
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#include "types.h"
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#include "shared.h"
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static void *open_shared(const char *key, size_t size, int *fd) {
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*fd = shm_open(key, O_CREAT | O_RDWR, S_IRUSR | S_IWUSR);
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ftruncate(*fd, size);
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return mmap(NULL, size, PROT_READ | PROT_WRITE, MAP_SHARED, *fd, 0);
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}
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static void close_shared(void *shared, size_t size, int fd) {
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munmap(shared, size);
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close(fd);
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}
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SharedContext *shared_init_context(const char *key) {
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int shared_fd;
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SharedContext *shared;
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shared = open_shared(key, sizeof(SharedContext), &shared_fd);
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shared->fd = shared_fd;
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return shared;
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}
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void shared_close_context(SharedContext *shared) {
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close_shared(shared, sizeof(SharedContext), shared->fd);
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} |