man3/pthread_equal.3

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  26 .TH PTHREAD_EQUAL 3 2015-08-08 "Linux" "Linux Programmer's Manual"
  27 .SH NAME
  28 pthread_equal \- compare thread IDs
  29 .SH SYNOPSIS
  30 .nf
  31 .B #include <pthread.h>
  32 .PP
  33 .BI "int pthread_equal(pthread_t " t1 ", pthread_t " t2 );
  34 .PP
  35 Compile and link with \fI\-pthread\fP.
  36 .fi
  37 .SH DESCRIPTION
  38 The
  39 .BR pthread_equal ()
  40 function compares two thread identifiers.
  41 .SH RETURN VALUE
  42 If the two thread IDs are equal,
  43 .BR pthread_equal ()
  44 returns a nonzero value; otherwise, it returns 0.
  45 .SH ERRORS
  46 This function always succeeds.
  47 .SH ATTRIBUTES
  48 For an explanation of the terms used in this section, see
  49 .BR attributes (7).
  50 .TS
  51 allbox;
  52 lb lb lb
  53 l l l.
  54 Interface       Attribute       Value
  55 T{
  56 .BR pthread_equal ()
  57 T}      Thread safety   MT-Safe
  58 .TE
  59 .SH CONFORMING TO
  60 POSIX.1-2001, POSIX.1-2008.
  61 .SH NOTES
  62 The
  63 .BR pthread_equal ()
  64 function is necessary because thread IDs should be considered opaque:
  65 there is no portable way for applications to directly compare two
  66 .I pthread_t
  67 values.
  68 .SH SEE ALSO
  69 .BR pthread_create (3),
  70 .BR pthread_self (3),
  71 .BR pthreads (7)