121 lines
2.6 KiB
C
121 lines
2.6 KiB
C
/* $FreeBSD$ */
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/*
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* Copyright (C) 2012 by Darren Reed.
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*
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* See the IPFILTER.LICENCE file for details on licencing.
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*
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* $Id$
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*/
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#include "ipf.h"
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#define EMM_MAGIC 0x9d7adba3
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static int mutex_debug = 0;
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static FILE *mutex_file = NULL;
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static int initcount = 0;
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void
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eMmutex_enter(eMmutex_t *mtx, char *file, int line)
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{
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if (mutex_debug & 2)
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fprintf(mutex_file, "%s:%d:eMmutex_enter(%s)\n", file, line,
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mtx->eMm_owner);
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if (mtx->eMm_magic != EMM_MAGIC) {
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fprintf(stderr, "%s:eMmutex_enter(%p): bad magic: %#x\n",
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mtx->eMm_owner, mtx, mtx->eMm_magic);
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abort();
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}
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if (mtx->eMm_held != 0) {
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fprintf(stderr, "%s:eMmutex_enter(%p): already locked: %d\n",
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mtx->eMm_owner, mtx, mtx->eMm_held);
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abort();
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}
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mtx->eMm_held++;
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mtx->eMm_heldin = file;
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mtx->eMm_heldat = line;
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}
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void
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eMmutex_exit(eMmutex_t *mtx, char *file, int line)
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{
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if (mutex_debug & 2)
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fprintf(mutex_file, "%s:%d:eMmutex_exit(%s)\n", file, line,
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mtx->eMm_owner);
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if (mtx->eMm_magic != EMM_MAGIC) {
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fprintf(stderr, "%s:eMmutex_exit(%p): bad magic: %#x\n",
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mtx->eMm_owner, mtx, mtx->eMm_magic);
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abort();
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}
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if (mtx->eMm_held != 1) {
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fprintf(stderr, "%s:eMmutex_exit(%p): not locked: %d\n",
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mtx->eMm_owner, mtx, mtx->eMm_held);
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abort();
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}
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mtx->eMm_held--;
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mtx->eMm_heldin = NULL;
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mtx->eMm_heldat = 0;
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}
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void
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eMmutex_init(eMmutex_t *mtx, char *who, char *file, int line)
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{
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if (mutex_file == NULL && mutex_debug)
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mutex_file = fopen("ipf_mutex_log", "w");
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if (mutex_debug & 1)
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fprintf(mutex_file, "%s:%d:eMmutex_init(%p,%s)\n",
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file, line, mtx, who);
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if (mtx->eMm_magic == EMM_MAGIC) { /* safe bet ? */
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fprintf(stderr,
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"%s:eMmutex_init(%p): already initialised?: %#x\n",
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mtx->eMm_owner, mtx, mtx->eMm_magic);
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abort();
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}
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mtx->eMm_magic = EMM_MAGIC;
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mtx->eMm_held = 0;
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if (who != NULL)
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mtx->eMm_owner = strdup(who);
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else
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mtx->eMm_owner = NULL;
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initcount++;
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}
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void
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eMmutex_destroy(eMmutex_t *mtx, char *file, int line)
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{
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if (mutex_debug & 1)
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fprintf(mutex_file,
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"%s:%d:eMmutex_destroy(%p,%s)\n", file, line,
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mtx, mtx->eMm_owner);
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if (mtx->eMm_magic != EMM_MAGIC) {
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fprintf(stderr, "%s:eMmutex_destroy(%p): bad magic: %#x\n",
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mtx->eMm_owner, mtx, mtx->eMm_magic);
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abort();
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}
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if (mtx->eMm_held != 0) {
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fprintf(stderr,
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"%s:eMmutex_enter(%p): still locked: %d\n",
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mtx->eMm_owner, mtx, mtx->eMm_held);
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abort();
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}
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if (mtx->eMm_owner != NULL)
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free(mtx->eMm_owner);
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memset(mtx, 0xa5, sizeof(*mtx));
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initcount--;
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}
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void
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ipf_mutex_clean(void)
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{
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if (initcount != 0) {
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if (mutex_file)
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fprintf(mutex_file, "initcount %d\n", initcount);
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abort();
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}
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}
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