bsd/kern/posix_sem.c

193 static int psem_cache_add(struct pseminfo *psemp, struct psemname *pnp, struct psemcache *pcp);
221 	struct psemcache *pcp, *nnp;
230 	for (pcp = pcpp->lh_first; pcp != 0; pcp = nnp) {
231 		nnp = pcp->psem_hash.le_next;
232 		if (pcp->psem_nlen == pnp->psem_namelen &&
233 		    !bcmp(pcp->psem_name, pnp->psem_nameptr, 						(u_int)pcp-> psem_nlen))
237 	if (pcp == 0) {
243         if (pcp->pseminfo) {
246 		*psemp = pcp->pseminfo;
247 		*pcache = pcp;
263 psem_cache_add(struct pseminfo *psemp, struct psemname *pnp, struct psemcache *pcp)
288 	pcp->pseminfo = psemp;
289 	pcp->psem_nlen = pnp->psem_namelen;
290 	bcopy(pnp->psem_nameptr, pcp->psem_name, (unsigned)pcp->psem_nlen);
297 			if (p == pcp)
301 	LIST_INSERT_HEAD(pcpp, pcp, psem_hash);
315 psem_cache_delete(struct psemcache *pcp)
318 	if (pcp->psem_hash.le_prev == 0)
320 	if (pcp->psem_hash.le_next == pcp)
323 	LIST_REMOVE(pcp, psem_hash);
324 	pcp->psem_hash.le_prev = NULL;
340 	struct psemcache *pcp;
344 		while ( (pcp = pcpp->lh_first) )
345 			psem_cache_delete(pcp);
369 	struct psemcache *pcp = PSEMCACHE_NULL;
436 	MALLOC(pcp, struct psemcache *, sizeof(struct psemcache), M_SHM, M_WAITOK|M_ZERO);
437 	if (pcp == PSEMCACHE_NULL) {
566 		/* if successful, this will consume the pcp */
567 		if ( (error = psem_cache_add(pinfo, &nd, pcp)) ) {
577 	 * if incache, we did not use the new pcp or the new pcp or the
581 		FREE(pcp, M_SHM);
582 		pcp = PSEMCACHE_NULL;
610 	if (pcp != PSEMCACHE_NULL)
611 		FREE(pcp, M_SHM);