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