'\" te .\" Copyright (c) 2008, Sun Microsystems, Inc. All Rights Reserved .\" Copyright 1989 AT&T .\" Portions Copyright (c) 1992, X/Open Company Limited All Rights Reserved .\" Sun Microsystems, Inc. gratefully acknowledges The Open Group for permission to reproduce portions of its copyrighted documentation. Original documentation from The Open Group can be obtained online at http://www.opengroup.org/bookstore/. .\" The Institute of Electrical and Electronics Engineers and The Open Group, have given us permission to reprint portions of their documentation. In the following statement, the phrase "this text" refers to portions of the system documentation. Portions of this text are reprinted and reproduced in electronic form in the Sun OS Reference Manual, from IEEE Std 1003.1, 2004 Edition, Standard for Information Technology -- Portable Operating System Interface (POSIX), The Open Group Base Specifications Issue 6, Copyright (C) 2001-2004 by the Institute of Electrical and Electronics Engineers, Inc and The Open Group. In the event of any discrepancy between these versions and the original IEEE and The Open Group Standard, the original IEEE and The Open Group Standard is the referee document. The original Standard can be obtained online at http://www.opengroup.org/unix/online.html. This notice shall appear on any product containing this material. .TH sem_destroy 3C "5 Feb 2008" "SunOS 5.11" "Standard C Library Functions" .SH NAME sem_destroy \- destroy an unnamed semaphore .SH SYNOPSIS .LP .nf #include \fBint\fR \fBsem_destroy\fR(\fBsem_t *\fR\fIsem\fR); .fi .SH DESCRIPTION .sp .LP The \fBsem_destroy()\fR function is used to destroy the unnamed semaphore indicated by \fIsem\fR. Only a semaphore that was created using \fBsem_init\fR(3C) may be destroyed using \fBsem_destroy()\fR; the effect of calling \fBsem_destroy()\fR with a named semaphore is undefined. The effect of subsequent use of the semaphore \fIsem\fR is undefined until \fIsem\fR is re-initialized by another call to \fBsem_init\fR(3C). .sp .LP It is safe to destroy an initialised semaphore upon which no threads are currently blocked. The effect of destroying a semaphore upon which other threads are currently blocked is undefined. .SH RETURN VALUES .sp .LP If successful, \fBsem_destroy()\fR returns \fB0\fR, otherwise it returns \fB\(mi1\fR and sets \fBerrno\fR to indicate the error. .SH ERRORS .sp .LP The \fBsem_destroy()\fR function will fail if: .sp .ne 2 .mk .na \fB\fBEINVAL\fR \fR .ad .RS 11n .rt The \fIsem\fR argument is not a valid semaphore. .RE .sp .LP The \fBsem_destroy()\fR function may fail if: .sp .ne 2 .mk .na \fB\fBEBUSY\fR \fR .ad .RS 10n .rt There are currently processes (or LWPs or threads) blocked on the semaphore. .RE .SH ATTRIBUTES .sp .LP See \fBattributes\fR(5) for descriptions of the following attributes: .sp .sp .TS tab() box; lw(2.75i) |lw(2.75i) lw(2.75i) |lw(2.75i) . ATTRIBUTE TYPEATTRIBUTE VALUE _ Interface StabilityCommitted _ MT-LevelMT-Safe _ StandardSee \fBstandards\fR(5). .TE .SH SEE ALSO .sp .LP \fBsem_init\fR(3C), \fBsem_open\fR(3C), \fBattributes\fR(5), \fBstandards\fR(5)