author | zautrix <zautrix> | 2005-03-18 20:17:03 (UTC) |
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committer | zautrix <zautrix> | 2005-03-18 20:17:03 (UTC) |
commit | 9e549686b23b6dffdcbd09c9b10dc2cb795fbcdf (patch) (side-by-side diff) | |
tree | 2528e6cc740225ca0f47d5ac8ff70f7d3bb10621 /libetpan/src/data-types/mailsem.c | |
parent | 9319998f20f03dcc217fbb39656755dc65226276 (diff) | |
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Initial revision
Diffstat (limited to 'libetpan/src/data-types/mailsem.c') (more/less context) (ignore whitespace changes)
-rw-r--r-- | libetpan/src/data-types/mailsem.c | 114 |
1 files changed, 114 insertions, 0 deletions
diff --git a/libetpan/src/data-types/mailsem.c b/libetpan/src/data-types/mailsem.c new file mode 100644 index 0000000..383d953 --- a/dev/null +++ b/libetpan/src/data-types/mailsem.c @@ -0,0 +1,114 @@ +/* + * libEtPan! -- a mail stuff library + * + * Copyright (C) 2001, 2005 - DINH Viet Hoa + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. Neither the name of the libEtPan! project nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +/* + * $Id$ + */ + +#include "mailsem.h" +#include <semaphore.h> +#include <stdlib.h> +#include <stdio.h> +#include <sys/stat.h> +#include <sys/types.h> +#include <fcntl.h> + +enum { + SEMKIND_SEMOPEN, + SEMKIND_SEMINIT, +}; + +#define SEMNAME_LEN 64 + +struct mailsem * mailsem_new(void) +{ + struct mailsem * sem; + int r; + + sem = malloc(sizeof(* sem)); + if (sem == NULL) + goto err; + + r = sem_init(sem->sem_sem, 0, 0); + if (r < 0) { + char name[SEMNAME_LEN]; + + free(sem->sem_sem); + + snprintf(name, sizeof(name), "sem-%p", sem); + +#ifndef __CYGWIN__ + sem->sem_sem = sem_open(name, O_CREAT, 0600, 0); + if (sem->sem_sem == NULL) + goto err; + + sem->sem_kind = SEMKIND_SEMOPEN; +#else + goto err; +#endif + } + else { + sem->sem_kind = SEMKIND_SEMINIT; + } + + return sem; + + err: + return NULL; +} + +void mailsem_free(struct mailsem * sem) +{ + if (sem->sem_kind == SEMKIND_SEMOPEN) { + char name[SEMNAME_LEN]; + +#ifndef __CYGWIN__ + sem_close((sem_t *) sem->sem_sem); + snprintf(name, sizeof(name), "sem-%p", sem); + sem_unlink(name); +#endif + } + else { + sem_destroy((sem_t *) sem->sem_sem); + free(sem->sem_sem); + } + free(sem); +} + +int mailsem_up(struct mailsem * sem) +{ + return sem_wait((sem_t *) sem->sem_sem); +} + +int mailsem_down(struct mailsem * sem) +{ + return sem_post((sem_t *) sem->sem_sem); +} |