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sem.c (147078) sem.c (157001)
1/*
2 * Copyright (c) 2000-2001, 2005 Sendmail, Inc. and its suppliers.
3 * All rights reserved.
4 *
5 * By using this file, you agree to the terms and conditions set
6 * forth in the LICENSE file which can be found at the top level of
7 * the sendmail distribution.
8 */
9
10#include <sm/gen.h>
1/*
2 * Copyright (c) 2000-2001, 2005 Sendmail, Inc. and its suppliers.
3 * All rights reserved.
4 *
5 * By using this file, you agree to the terms and conditions set
6 * forth in the LICENSE file which can be found at the top level of
7 * the sendmail distribution.
8 */
9
10#include <sm/gen.h>
11SM_RCSID("@(#)$Id: sem.c,v 1.12 2005/03/25 21:27:02 ca Exp $")
11SM_RCSID("@(#)$Id: sem.c,v 1.13 2005/08/12 20:39:59 ca Exp $")
12
13#if SM_CONF_SEM
14# include <stdlib.h>
15# include <unistd.h>
16# include <sm/sem.h>
17# include <sm/heap.h>
12
13#if SM_CONF_SEM
14# include <stdlib.h>
15# include <unistd.h>
16# include <sm/sem.h>
17# include <sm/heap.h>
18# include <errno.h>
18
19/*
20** SM_SEM_START -- initialize semaphores
21**
22** Parameters:
23** key -- key for semaphores.
24** nsem -- number of semaphores.
25** semflg -- flag for semget(), if 0, use a default.

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32
33int
34sm_sem_start(key, nsem, semflg, owner)
35 key_t key;
36 int nsem;
37 int semflg;
38 bool owner;
39{
19
20/*
21** SM_SEM_START -- initialize semaphores
22**
23** Parameters:
24** key -- key for semaphores.
25** nsem -- number of semaphores.
26** semflg -- flag for semget(), if 0, use a default.

--- 6 unchanged lines hidden (view full) ---

33
34int
35sm_sem_start(key, nsem, semflg, owner)
36 key_t key;
37 int nsem;
38 int semflg;
39 bool owner;
40{
40 int semid, i;
41 int semid, i, err;
41 unsigned short *semvals;
42
43 semvals = NULL;
44 if (semflg == 0)
45 semflg = (SEM_A|SEM_R)|((SEM_A|SEM_R) >> 3);
46 if (owner)
47 semflg |= IPC_CREAT|IPC_EXCL;
48 semid = semget(key, nsem, semflg);

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62 for (i = 0; i < nsem; i++)
63 semvals[i] = 1;
64 if (semctl(semid, 0, SETALL, semarg) < 0)
65 goto error;
66 }
67 return semid;
68
69error:
42 unsigned short *semvals;
43
44 semvals = NULL;
45 if (semflg == 0)
46 semflg = (SEM_A|SEM_R)|((SEM_A|SEM_R) >> 3);
47 if (owner)
48 semflg |= IPC_CREAT|IPC_EXCL;
49 semid = semget(key, nsem, semflg);

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63 for (i = 0; i < nsem; i++)
64 semvals[i] = 1;
65 if (semctl(semid, 0, SETALL, semarg) < 0)
66 goto error;
67 }
68 return semid;
69
70error:
71 err = errno;
70 if (semvals != NULL)
71 sm_free(semvals);
72 if (semid >= 0)
73 sm_sem_stop(semid);
72 if (semvals != NULL)
73 sm_free(semvals);
74 if (semid >= 0)
75 sm_sem_stop(semid);
74 return -1;
76 return (err > 0) ? (0 - err) : -1;
75}
76
77/*
78** SM_SEM_STOP -- stop using semaphores.
79**
80** Parameters:
81** semid -- id for semaphores.
82**

--- 119 unchanged lines hidden --- 		77}
78
79/*
80** SM_SEM_STOP -- stop using semaphores.
81**
82** Parameters:
83** semid -- id for semaphores.
84**

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