Use pthread_setconcurrency() in wxThread::SetConcurrency().

Use POSIX function if available instead of only using Solaris-specific
thr_setconcurrency() which is not found in modern Linux systems any more.

Closes #2115.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@70960 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

configure

@@ -42935,6 +42935,102 @@ echo "${ECHO_T}${flag}" >&6; }
 
         if test "$wxUSE_THREADS" = "yes" ; then
 
+for ac_func in pthread_setconcurrency
+do
+as_ac_var=`echo "ac_cv_func_$ac_func" | $as_tr_sh`
+{ echo "$as_me:$LINENO: checking for $ac_func" >&5
+echo $ECHO_N "checking for $ac_func... $ECHO_C" >&6; }
+if { as_var=$as_ac_var; eval "test \"\${$as_var+set}\" = set"; }; then
+  echo $ECHO_N "(cached) $ECHO_C" >&6
+else
+  cat >conftest.$ac_ext <<_ACEOF
+/* confdefs.h.  */
+_ACEOF
+cat confdefs.h >>conftest.$ac_ext
+cat >>conftest.$ac_ext <<_ACEOF
+/* end confdefs.h.  */
+/* Define $ac_func to an innocuous variant, in case <limits.h> declares $ac_func.
+   For example, HP-UX 11i <limits.h> declares gettimeofday.  */
+#define $ac_func innocuous_$ac_func
+
+/* System header to define __stub macros and hopefully few prototypes,
+    which can conflict with char $ac_func (); below.
+    Prefer <limits.h> to <assert.h> if __STDC__ is defined, since
+    <limits.h> exists even on freestanding compilers.  */
+
+#ifdef __STDC__
+# include <limits.h>
+#else
+# include <assert.h>
+#endif
+
+#undef $ac_func
+
+/* Override any GCC internal prototype to avoid an error.
+   Use char because int might match the return type of a GCC
+   builtin and then its argument prototype would still apply.  */
+#ifdef __cplusplus
+extern "C"
+#endif
+char $ac_func ();
+/* The GNU C library defines this for functions which it implements
+    to always fail with ENOSYS.  Some functions are actually named
+    something starting with __ and the normal name is an alias.  */
+#if defined __stub_$ac_func || defined __stub___$ac_func
+choke me
+#endif
+
+int
+main ()
+{
+return $ac_func ();
+  ;
+  return 0;
+}
+_ACEOF
+rm -f conftest.$ac_objext conftest$ac_exeext
+if { (ac_try="$ac_link"
+case "(($ac_try" in
+  *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
+  *) ac_try_echo=$ac_try;;
+esac
+eval "echo \"\$as_me:$LINENO: $ac_try_echo\"") >&5
+  (eval "$ac_link") 2>conftest.er1
+  ac_status=$?
+  grep -v '^ *+' conftest.er1 >conftest.err
+  rm -f conftest.er1
+  cat conftest.err >&5
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); } && {
+	 test -z "$ac_c_werror_flag" ||
+	 test ! -s conftest.err
+       } && test -s conftest$ac_exeext &&
+       $as_test_x conftest$ac_exeext; then
+  eval "$as_ac_var=yes"
+else
+  echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+
+	eval "$as_ac_var=no"
+fi
+
+rm -f core conftest.err conftest.$ac_objext conftest_ipa8_conftest.oo \
+      conftest$ac_exeext conftest.$ac_ext
+fi
+ac_res=`eval echo '${'$as_ac_var'}'`
+	       { echo "$as_me:$LINENO: result: $ac_res" >&5
+echo "${ECHO_T}$ac_res" >&6; }
+if test `eval echo '${'$as_ac_var'}'` = yes; then
+  cat >>confdefs.h <<_ACEOF
+#define `echo "HAVE_$ac_func" | $as_tr_cpp` 1
+_ACEOF
+ cat >>confdefs.h <<\_ACEOF
+#define HAVE_PTHREAD_SET_CONCURRENCY 1
+_ACEOF
+
+else
+
+
 for ac_func in thr_setconcurrency
 do
 as_ac_var=`echo "ac_cv_func_$ac_func" | $as_tr_sh`
@@ -43024,6 +43120,16 @@ if test `eval echo '${'$as_ac_var'}'` = yes; then
   cat >>confdefs.h <<_ACEOF
 #define `echo "HAVE_$ac_func" | $as_tr_cpp` 1
 _ACEOF
+ cat >>confdefs.h <<\_ACEOF
+#define HAVE_THR_SETCONCURRENCY 1
+_ACEOF
+
+else
+  { echo "$as_me:$LINENO: WARNING: Setting thread concurrency will not work properly" >&5
+echo "$as_me: WARNING: Setting thread concurrency will not work properly" >&2;}
+fi
+done
+
 
 fi
 done

configure.in

@@ -4977,7 +4977,13 @@ if test "$TOOLKIT" != "MSW" -a "$USE_OS2" != 1; then
 
     dnl do other tests only if we are using threads
     if test "$wxUSE_THREADS" = "yes" ; then
-      AC_CHECK_FUNCS(thr_setconcurrency)
+        AC_CHECK_FUNCS(pthread_setconcurrency,
+            AC_DEFINE(HAVE_PTHREAD_SET_CONCURRENCY),
+            [
+                AC_CHECK_FUNCS(thr_setconcurrency,
+                    AC_DEFINE(HAVE_THR_SETCONCURRENCY),
+                    AC_MSG_WARN(Setting thread concurrency will not work properly))
+            ])
 
       dnl can't use AC_CHECK_FUNCS for this one as it's usually a macro and so
       dnl wouldn't be found by it

docs/changes.txt

@@ -522,6 +522,7 @@ OSX:
 Univ:
 
 - Fix regression with read-only wxComboBox appearance (Jason Erb).
+- Implement wxThread::SetConcurrency() for POSIX systems (Igor Korot).
 
 
 

setup.h.in

@@ -1117,6 +1117,9 @@
 /* Define if you have thr_setconcurrency function */
 #undef HAVE_THR_SETCONCURRENCY
 
+/* Define if you have pthread_setconcurrency function */
+#undef HAVE_PTHREAD_SET_CONCURRENCY
+
 /* Define if you have the uname function.  */
 #undef HAVE_UNAME
 

src/unix/threadpsx.cpp

@@ -1127,18 +1127,23 @@ wxThreadIdType wxThread::GetCurrentId()
 
 bool wxThread::SetConcurrency(size_t level)
 {
-#ifdef HAVE_THR_SETCONCURRENCY
+#ifdef HAVE_PTHREAD_SET_CONCURRENCY
+    int rc = pthread_setconcurrency( level );
+#elif defined(HAVE_THR_SETCONCURRENCY)
     int rc = thr_setconcurrency(level);
-    if ( rc != 0 )
-    {
-        wxLogSysError(rc, wxT("thr_setconcurrency() failed"));
-    }
-
-    return rc == 0;
 #else // !HAVE_THR_SETCONCURRENCY
     // ok only for the default value
-    return level == 0;
+    int rc = level == 0 ? 0 : -1;
 #endif // HAVE_THR_SETCONCURRENCY/!HAVE_THR_SETCONCURRENCY
+
+    if ( rc != 0 )
+    {
+        wxLogSysError(rc, _("Failed to set thread concurrency level to %lu"),
+                      static_cast<unsigned long>(level));
+        return false;
+    }
+
+    return true;
 }
 
 // -----------------------------------------------------------------------------