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All Rights Reserved. .\" Copyright (c) 2001, The IEEE and The Open Group. All Rights Reserved. .\" Copyright (c) 2007 Sun Microsystems, Inc. All Rights Reserved .\" .TH THR_EXIT 3C "Nov 2, 2007" .SH NAME thr_exit \- terminate the calling thread .SH SYNOPSIS .LP .nf cc -mt [ \fIflag\fR... ] \fIfile\fR...[ \fIlibrary\fR... ] #include \fBvoid\fR \fBthr_exit\fR(\fBvoid *\fR\fIstatus\fR); .fi .SH DESCRIPTION .sp .LP The \fBthr_exit()\fR function terminates the calling thread, in a similar way that \fBexit\fR(3C) terminates the calling process. If the calling thread is not detached, then the thread's \fBID\fR and the exit status specified by \fIstatus\fR are retained. The value \fIstatus\fR is then made available to any successful join with the terminating thread (see \fBthr_join\fR(3C)); otherwise, \fIstatus\fR is disregarded allowing the thread's ID to be reclaimed immediately. .sp .LP Any cancellation cleanup handlers that have been pushed and not yet popped are popped in the reverse order that they were pushed and then executed. After all cancellation cleanup handlers have been executed, if the thread has any thread-specific data, appropriate destructor functions will be called in an unspecified order. Thread termination does not release any application visible process resources, including, but not limited to, mutexes and file descriptors, nor does it perform any process level cleanup actions, including, but not limited to, calling any \fBatexit()\fR routines that might exist. .sp .LP An exiting thread runs with all signals blocked. All thread termination functions, including cancellation cleanup handlers and thread-specific data destructor functions, are called with all signals blocked. .sp .LP If any thread, including the \fBmain()\fR thread, calls \fBthr_exit()\fR, only that thread will exit. .sp .LP If \fBmain()\fR returns or exits (either implicitly or explicitly), or any thread explicitly calls \fBexit()\fR, the entire process will exit. .sp .LP The behavior of \fBthr_exit()\fR is undefined if called from a cancellation cleanup handler or destructor function that was invoked as a result of either an implicit or explicit call to \fBthr_exit()\fR. .sp .LP After a thread has terminated, the result of access to local (auto) variables of the thread is undefined. Thus, references to local variables of the exiting thread should not be used for the \fBthr_exit()\fR \fIstatus\fR parameter value. .sp .LP If any thread (except the \fBmain()\fR thread) implicitly or explicitly returns, the result is the same as if the thread called \fBthr_exit()\fR and it will return the value of \fIstatus\fR as the exit code. .sp .LP The process will terminate with an exit status of \fB0\fR after the last non-daemon thread has terminated (including the \fBmain()\fR thread). This behavior is the same as if the application had called \fBexit()\fR with a \fB0\fR argument at thread termination time. .SH RETURN VALUES .sp .LP The \fBthr_exit()\fR function cannot return to its caller. .SH ERRORS .sp .LP No errors are defined. .SH ATTRIBUTES .sp .LP See \fBattributes\fR(7) for descriptions of the following attributes: .sp .sp .TS box; c | c l | l . ATTRIBUTE TYPE ATTRIBUTE VALUE _ MT-Level MT-Safe .TE .SH SEE ALSO .sp .LP .BR exit (3C), .BR thr_create (3C), .BR thr_join (3C), .BR thr_keycreate (3C), .BR attributes (7), .BR standards (7) .SH NOTES .sp .LP Although only POSIX implements cancellation, cancellation can be used with Solaris threads, due to their interoperability. .sp .LP The \fIstatus\fR argument should not reference any variables local to the calling thread.