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| .TH PTHREAD_EQUAL 3 2015-08-08 "Linux" "Linux Programmer's Manual" |
| .SH NAME |
| pthread_equal \- compare thread IDs |
| .SH SYNOPSIS |
| .nf |
| .B #include <pthread.h> |
| |
| .BI "int pthread_equal(pthread_t " t1 ", pthread_t " t2 ); |
| .sp |
| Compile and link with \fI\-pthread\fP. |
| .fi |
| .SH DESCRIPTION |
| The |
| .BR pthread_equal () |
| function compares two thread identifiers. |
| .SH RETURN VALUE |
| If the two thread IDs are equal, |
| .BR pthread_equal () |
| returns a nonzero value; otherwise, it returns 0. |
| .SH ERRORS |
| This function always succeeds. |
| .SH ATTRIBUTES |
| For an explanation of the terms used in this section, see |
| .BR attributes (7). |
| .TS |
| allbox; |
| lb lb lb |
| l l l. |
| Interface Attribute Value |
| T{ |
| .BR pthread_equal () |
| T} Thread safety MT-Safe |
| .TE |
| .SH CONFORMING TO |
| POSIX.1-2001, POSIX.1-2008. |
| .SH NOTES |
| The |
| .BR pthread_equal () |
| function is necessary because thread IDs should be considered opaque: |
| there is no portable way for applications to directly compare two |
| .I pthread_t |
| values. |
| .SH SEE ALSO |
| .BR pthread_create (3), |
| .BR pthread_self (3), |
| .BR pthreads (7) |