57 lines
1.1 KiB
C
57 lines
1.1 KiB
C
#include <stdio.h>
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#include <sys/shm.h>
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#include <sys/stat.h>
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#include <custom_shm.h>
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#include <errExit.h>
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#include <forza4.h>
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int _SHMID;
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void setupServerShm() {
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_SHMID = getShmid(_ROWS, _COLLUMS);
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_BOARD = shmServerAt(_SHMID);
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for (int i=0; i < _ROWS * _COLLUMS; i++) {
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_BOARD[i] = EMPTY;
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}
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}
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int getShmid(int row, int col) {
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int shmid = shmget(ftok(KEYFILE, 'z'), row * col * sizeof(tile_t), IPC_CREAT | S_IRUSR | S_IWUSR);
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if (shmid == -1) {
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errExit("shmget", "getShmid");
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}
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return shmid;
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}
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tile_t * shmServerAt(int shmid) {
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tile_t *board = (tile_t *)shmat(shmid, NULL, 0);
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if (board == SHMERR) {
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errExit("shmat", "shmServerAt");
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}
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return board;
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}
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tile_t * shmClientAt(int shmid) {
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tile_t *board = (tile_t *)shmat(shmid, NULL, SHM_RDONLY);
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if (board == SHMERR) {
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errExit("shmat", "shmClientAt");
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}
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return board;
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}
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void shmDt(void *shm_ptr) {
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if (shmdt(shm_ptr) == -1) {
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errExit("shmdt", "shmDt");
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}
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}
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void shmServerRm(int shmid) {
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if (shmctl(shmid, IPC_RMID, NULL) == -1) {
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errExit("shmctl", "shmServerRm");
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}
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} |