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[linuxjm/jm.git] / manual / glibc-linuxthreads / release / man3 / sem_init.3

.\"   Copyright (C) 1996-1999 Free Software Foundation, Inc.
.\"
.\"   Permission is granted to make and distribute verbatim copies of
.\" this manual provided the copyright notice and this permission notice are
.\" preserved on all copies.
.\"
.\"   Permission is granted to copy and distribute modified versions of
.\" this manual under the conditions for verbatim copying, provided that
.\" the entire resulting derived work is distributed under the terms of a
.\" permission notice identical to this one.
.\"
.\"   Permission is granted to copy and distribute translations of this
.\" manual into another language, under the above conditions for modified
.\" versions, except that this permission notice may be stated in a
.\" translation approved by the Foundation.
.\"
.\" Copyright (C) 1996 Xavier Leroy.
.\"
.\" Japanese Version Copyright (C) 2002-2003 Suzuki Takashi
.\"         all rights reserved.
.\" Translated Fri Jan  3 23:23:30 JST 2003
.\"         by Suzuki Takashi.
.\"
.\"WORD:    semaphore           ¥»¥Þ¥Õ¥©
.\"WORD:    atomically          °ì©¤Ç
.\"WORD:    semaphore object    ¥»¥Þ¥Õ¥©¥ª¥Ö¥¸¥§¥¯¥È
.\"WORD:    atomic compare-and-swap ÉÔ²Äʬ¤ÎÈæ³Ó¸ò´¹Ì¿Îá
.\"WORD:    atomic operation    ÉÔ²Äʬ̿Îá
.\"WORD:    wait on the semaphore   ¥»¥Þ¥Õ¥©¤Î³ÍÆÀÂÔ¤Á
.\"
.\"
.TH SEMAPHORES 3 LinuxThreads


.SH "̾Á°"
sem_init, sem_wait, sem_trywait, sem_post, sem_getvalue, sem_destroy \- ¥»¥Þ¥Õ¥©¤ÎÁàºî

.SH "½ñ¼°"
.B #include <semaphore.h>

.BI "int sem_init(sem_t *" sem ", int " pshared ", unsigned int " value ");"

.BI "int sem_wait(sem_t * " sem ");"

.BI "int sem_trywait(sem_t * " sem ");"

.BI "int sem_post(sem_t * " sem ");"

.BI "int sem_getvalue(sem_t * " sem ", int * " sval ");"

.BI "int sem_destroy(sem_t * " sem ");"

.SH "ÀâÌÀ"
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.BR "ipc" (5)
¤ä
.BR "semctl" (2)
¡¢
.BR "semop" (2)
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.B "sem_init"
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.I "sem"
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.I "value"
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.I "pshared"
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.I "pshared"
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.I "pshared"
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.B "sem_init"
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.B "ENOSYS"
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.B "sem_wait"
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.B "sem_trywait"
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.B "sem_wait"
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.B "sem_trywait"
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.B "sem_trywait"
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.B "EAGAIN"
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.B "sem_post"
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.B "sem_getvalue"
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.I "sval"
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.I "sem"
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.B "sem_destroy"
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.B "sem_destroy"
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.B "sem_destroy"
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.SH "¼è¤ê¾Ã¤·"

.B "sem_wait"
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.SH "ÈóƱ´ü¥·¥°¥Ê¥ë¤Î°ÂÁ´À­"

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CPU (Intel 486 ¤ä Pentium ¤ª¤è¤Ó¤½¤Î¸å·Ñ¡¢
Alpha ¡¢ PowerPC ¡¢ MIPS II ¡¢ Motorola 68k) ¤Ç¤Ï¡¢
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.B "sem_post"
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.B "sem_post"
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.B "sem_post"
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.SH "ÊÖ¤êÃÍ"

´Ø¿ô
.B "sem_wait"
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.B "sem_getvalue"
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.B "errno"
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.SH "¥¨¥é¡¼"

´Ø¿ô
.B "sem_init"
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.B "errno"
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.RS
.TP
.B "EINVAL"
.I "value"
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.B "SEM_VALUE_MAX"
¤òĶ¤¨¤Æ¤¤¤ë¡£
.TP
.B "ENOSYS"
.I "pshared"
¤¬ 0 ¤Ç¤Ê¤¤¡£
.RE

´Ø¿ô
.B "sem_trywait"
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.B "errno"
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.RS
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.B "EAGAIN"
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.RE

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.B "sem_post"
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.B "errno"
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.B "ERANGE"
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.B "SEM_VALUE_MAX"
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(¤³¤Î¾ì¹ç¡¢¥»¥Þ¥Õ¥©¥«¥¦¥ó¥È¤ÏÊѹ¹¤µ¤ì¤Ê¤¤) ¡£
.RE

´Ø¿ô
.B "sem_destroy"
¤Ï¥¨¥é¡¼¤Î¾ì¹ç¤Ë¼¡¤Î¤è¤¦¤Ê¥¨¥é¡¼¥³¡¼¥É¤ò
.B "errno"
¤Ë³ÊǼ¤¹¤ë:
.RS
.TP
.B "EBUSY"
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.RE

.SH "Ãø¼Ô"
Xavier Leroy <Xavier.Leroy@inria.fr>

.SH "´ØÏ¢»ö¹à"
.BR "pthread_mutex_init" (3),
.BR "pthread_cond_init" (3),
.BR "pthread_cancel" (3),
.BR "ipc" (5).