[pclasses-cvs] pclasses2 configure.in,1.8,1.9

[Christian P. <cp...@us...>]

Update of /cvsroot/pclasses/pclasses2
In directory sc8-pr-cvs1.sourceforge.net:/tmp/cvs-serv9938

Modified Files:
	configure.in 
Log Message:
Added configure check for native atomic integers


Index: configure.in
===================================================================
RCS file: /cvsroot/pclasses/pclasses2/configure.in,v
retrieving revision 1.8
retrieving revision 1.9
diff -u -d -r1.8 -r1.9
--- configure.in	19 Jan 2005 13:25:55 -0000	1.8
+++ configure.in	23 Apr 2005 12:00:06 -0000	1.9
@@ -70,6 +70,36 @@
 AC_FUNC_MMAP
 
 dnl
+dnl check cpu/compiler type for atomicint support ...
+dnl
+
+AC_MSG_CHECKING([for native atomic int support ...])
+pc_atomic_int="none"
+
+AC_TRY_COMPILE([], [
+	int val;
+        unsigned char c;
+        __asm__ __volatile__(
+                "lock; incl %0; sete %1"
+                :"=m" (val), "=qm" (c)
+                :"m" (val) : "memory");
+], pc_atomic_int="gcc_x86")
+
+AC_TRY_COMPILE([#include <windows.h>], [
+        int val;
+        InterlockedIncrement((volatile LONG*)val);
+], pc_atomic_int="win32")
+
+AC_MSG_RESULT($pc_atomic_int)
+
+AM_CONDITIONAL(WITH_GCC_X86_ATOMIC_INT, test "$pc_atomic_int" = "gcc_x86")
+AM_CONDITIONAL(WITH_WIN32_ATOMIC_INT, test "$pc_atomic_int" = "win32")
+
+if test "$pc_atomic_int" != "none"; then
+	AC_DEFINE_UNQUOTED(HAVE_ATOMIC_INT, 1, [Defined if atomic integers are supported])
+fi
+
+dnl
 dnl check for threading libraries
 dnl
 ACX_PTHREAD