build/configure.ac.tls

   1 m4_define([libcairo_pthread_setspecific_program],[dnl
   2     #include <stdlib.h>
   3     #include <pthread.h>
   4     #include <stdio.h>
   5
   6     static pthread_once_t once_control = PTHREAD_ONCE_INIT;
   7     static pthread_key_t key;
   8
   9     static void
  10     make_key (void)
  11     {
  12         pthread_key_create (&key, NULL);
  13     }
  14
  15     int
  16     main (int argc, char **argv)
  17     {
  18         void *value = NULL;
  19
  20         if (pthread_once (&once_control, make_key) != 0)
  21         {
  22            value = NULL;
  23         }
  24         else
  25         {
  26             value = pthread_getspecific (key);
  27             if (!value)
  28             {
  29                 value = malloc (100);
  30                 pthread_setspecific (key, value);
  31             }
  32         }
  33
  34         printf ("%d, %p\n", argc, argv);
  35         return 0;
  36     }
  37 }])
  38
  39 AC_DEFUN([CAIRO_CONFIGURE_TLS], [dnl
  40     have_tls=no
  41     AC_CACHE_VAL(ac_cv_tls, [
  42         ac_cv_tls=none
  43         keywords="__thread __declspec(thread)"
  44         for kw in $keywords ; do
  45             AC_TRY_COMPILE([
  46             #if defined(__MINGW32__) && !(__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 5))
  47             #error This MinGW version has broken __thread support
  48             #endif
  49             #ifdef __OpenBSD__
  50             #error OpenBSD has broken __thread support
  51             #endif
  52
  53         int $kw test;], [], [ac_cv_tls=$kw; break])
  54         done
  55     ])
  56
  57     if test "$ac_cv_tls" != "none"; then
  58         have_tls=yes
  59         AC_DEFINE([CAIRO_HAS_TLS], 1, [Define to 1 if we have tls support])
  60         AC_DEFINE_UNQUOTED([TLS], $ac_cv_tls, [The compiler supported TLS storage class])
  61     fi
  62
  63     dnl Set the output variables for CAIRO_ENABLE.
  64     use_tls="$have_tls"
  65     tls_REQUIRES=""
  66 ])
  67
  68 AC_DEFUN([CAIRO_CHECK_PTHREAD_SETSPECIFIC],[dnl
  69     CAIRO_CC_TRY_LINK_WITH_ENV_SILENT(
  70         [CFLAGS="$CFLAGS $2";
  71         LIBS="$LIBS $3"],
  72         [$4],
  73         [$1_CFLAGS="$2";
  74         $1_LIBS="$3";
  75         $5],
  76         [$1_CFLAGS="";
  77         $1_LIBS="";
  78         $6])
  79 ])
  80
  81 AC_DEFUN([CAIRO_CONFIGURE_PTHREAD_SETSPECIFIC],[dnl
  82     if test "x$PTHREAD_SETSPECIFIC_CFLAGS" = "x"; then
  83         PTHREAD_SETSPECIFIC_CFLAGS="-D_REENTRANT"
  84     fi
  85
  86     if test "x$PTHREAD_SETSPECIFIC_LIBS" = "x"; then
  87         PTHREAD_SETSPECIFIC_LIBS="-lpthread"
  88     fi
  89
  90     CAIRO_CHECK_PTHREAD_SETSPECIFIC(
  91         [pthread_setspecific], [$PTHREAD_SETSPECIFIC_CFLAGS], [$PTHREAD_SETSPECIFIC_LIBS],
  92         [libcairo_pthread_setspecific_program],
  93         [have_pthread_setspecific=yes],
  94         [have_pthread_setspecific=no])
  95
  96     PTHREAD_SETSPECIFIC_CFLAGS=
  97     PTHREAD_SETSPECIFIC_LIBS=
  98
  99     dnl Tell autoconf about the results.
 100     if test "x$have_pthread_setspecific" = "xyes"; then
 101         AC_DEFINE([CAIRO_HAS_PTHREAD_SETSPECIFIC], 1,
 102                   [Define to 1 if we have pthread_setspecific support])
 103     fi
 104
 105     dnl Set the output variables for CAIRO_ENABLE.
 106     use_pthread_setspecific="$have_pthread_setspecific"
 107     pthread_setspecific_REQUIRES=""
 108 ])