diff options
Diffstat (limited to 'contrib/ipfilter/lib/rwlock_emul.c')
| -rw-r--r-- | contrib/ipfilter/lib/rwlock_emul.c | 145 |
1 files changed, 145 insertions, 0 deletions
diff --git a/contrib/ipfilter/lib/rwlock_emul.c b/contrib/ipfilter/lib/rwlock_emul.c new file mode 100644 index 0000000..24d00a5 --- /dev/null +++ b/contrib/ipfilter/lib/rwlock_emul.c @@ -0,0 +1,145 @@ +/* $FreeBSD$ */ + +/* + * Copyright (C) 2012 by Darren Reed. + * + * See the IPFILTER.LICENCE file for details on licencing. + * + * $Id$ + */ + +#include "ipf.h" + +#define EMM_MAGIC 0x97dd8b3a + +void eMrwlock_read_enter(rw, file, line) + eMrwlock_t *rw; + char *file; + int line; +{ + if (rw->eMrw_magic != EMM_MAGIC) { + fprintf(stderr, "%s:eMrwlock_read_enter(%p): bad magic: %#x\n", + rw->eMrw_owner, rw, rw->eMrw_magic); + abort(); + } + if (rw->eMrw_read != 0 || rw->eMrw_write != 0) { + fprintf(stderr, + "%s:eMrwlock_read_enter(%p): already locked: %d/%d\n", + rw->eMrw_owner, rw, rw->eMrw_read, rw->eMrw_write); + abort(); + } + rw->eMrw_read++; + rw->eMrw_heldin = file; + rw->eMrw_heldat = line; +} + + +void eMrwlock_write_enter(rw, file, line) + eMrwlock_t *rw; + char *file; + int line; +{ + if (rw->eMrw_magic != EMM_MAGIC) { + fprintf(stderr, "%s:eMrwlock_write_enter(%p): bad magic: %#x\n", + rw->eMrw_owner, rw, rw->eMrw_magic); + abort(); + } + if (rw->eMrw_read != 0 || rw->eMrw_write != 0) { + fprintf(stderr, + "%s:eMrwlock_write_enter(%p): already locked: %d/%d\n", + rw->eMrw_owner, rw, rw->eMrw_read, rw->eMrw_write); + abort(); + } + rw->eMrw_write++; + rw->eMrw_heldin = file; + rw->eMrw_heldat = line; +} + + +void eMrwlock_downgrade(rw, file, line) + eMrwlock_t *rw; + char *file; + int line; +{ + if (rw->eMrw_magic != EMM_MAGIC) { + fprintf(stderr, "%s:eMrwlock_write_enter(%p): bad magic: %#x\n", + rw->eMrw_owner, rw, rw->eMrw_magic); + abort(); + } + if (rw->eMrw_read != 0 || rw->eMrw_write != 1) { + fprintf(stderr, + "%s:eMrwlock_write_enter(%p): already locked: %d/%d\n", + rw->eMrw_owner, rw, rw->eMrw_read, rw->eMrw_write); + abort(); + } + rw->eMrw_write--; + rw->eMrw_read++; + rw->eMrw_heldin = file; + rw->eMrw_heldat = line; +} + + +void eMrwlock_exit(rw) + eMrwlock_t *rw; +{ + if (rw->eMrw_magic != EMM_MAGIC) { + fprintf(stderr, "%s:eMrwlock_exit(%p): bad magic: %#x\n", + rw->eMrw_owner, rw, rw->eMrw_magic); + abort(); + } + if (rw->eMrw_read != 1 && rw->eMrw_write != 1) { + fprintf(stderr, "%s:eMrwlock_exit(%p): not locked: %d/%d\n", + rw->eMrw_owner, rw, rw->eMrw_read, rw->eMrw_write); + abort(); + } + if (rw->eMrw_read == 1) + rw->eMrw_read--; + else if (rw->eMrw_write == 1) + rw->eMrw_write--; + rw->eMrw_heldin = NULL; + rw->eMrw_heldat = 0; +} + + +static int initcount = 0; + +void eMrwlock_init(rw, who) + eMrwlock_t *rw; + char *who; +{ + if (rw->eMrw_magic == EMM_MAGIC) { /* safe bet ? */ + fprintf(stderr, + "%s:eMrwlock_init(%p): already initialised?: %#x\n", + rw->eMrw_owner, rw, rw->eMrw_magic); + abort(); + } + rw->eMrw_magic = EMM_MAGIC; + rw->eMrw_read = 0; + rw->eMrw_write = 0; + if (who != NULL) + rw->eMrw_owner = strdup(who); + else + rw->eMrw_owner = NULL; + initcount++; +} + + +void eMrwlock_destroy(rw) + eMrwlock_t *rw; +{ + if (rw->eMrw_magic != EMM_MAGIC) { + fprintf(stderr, "%s:eMrwlock_destroy(%p): bad magic: %#x\n", + rw->eMrw_owner, rw, rw->eMrw_magic); + abort(); + } + if (rw->eMrw_owner != NULL) + free(rw->eMrw_owner); + memset(rw, 0xa5, sizeof(*rw)); + initcount--; +} + +void ipf_rwlock_clean() +{ + if (initcount != 0) + abort(); +} |
