Added SDL_GetCPUCount() to see how many cores are available.

--HG--
extra : convert_revision : svn%3Ac70aab31-4412-0410-b14c-859654838e24/trunk%404328

configure.in

@@ -207,7 +207,7 @@ if test x$enable_libc = xyes; then
         AC_DEFINE(HAVE_MPROTECT)
         ]),
     )
-    AC_CHECK_FUNCS(malloc calloc realloc free getenv putenv unsetenv qsort abs bcopy memset memcpy memmove strlen strlcpy strlcat strdup _strrev _strupr _strlwr strchr strrchr strstr itoa _ltoa _uitoa _ultoa strtol strtoul _i64toa _ui64toa strtoll strtoull atoi atof strcmp strncmp _stricmp strcasecmp _strnicmp strncasecmp sscanf snprintf vsnprintf sigaction setjmp nanosleep)
+    AC_CHECK_FUNCS(malloc calloc realloc free getenv putenv unsetenv qsort abs bcopy memset memcpy memmove strlen strlcpy strlcat strdup _strrev _strupr _strlwr strchr strrchr strstr itoa _ltoa _uitoa _ultoa strtol strtoul _i64toa _ui64toa strtoll strtoull atoi atof strcmp strncmp _stricmp strcasecmp _strnicmp strncasecmp sscanf snprintf vsnprintf sigaction setjmp nanosleep sysctlbyname)
 
     AC_CHECK_LIB(m, pow, [LIBS="$LIBS -lm"; EXTRA_LDFLAGS="$EXTRA_LDFLAGS -lm"])
     AC_CHECK_FUNCS(ceil copysign cos cosf fabs floor log pow scalbn sin sinf sqrt)

include/SDL_config.h.in

@@ -150,6 +150,7 @@
 #undef HAVE_SIGACTION
 #undef HAVE_SETJMP
 #undef HAVE_NANOSLEEP
+#undef HAVE_SYSCTLBYNAME
 #undef HAVE_CLOCK_GETTIME
 #undef HAVE_GETPAGESIZE
 #undef HAVE_MPROTECT

include/SDL_config_iphoneos.h

@@ -106,6 +106,7 @@ typedef unsigned long uintptr_t;
 #define HAVE_SIGACTION	1
 #define HAVE_SETJMP	1
 #define HAVE_NANOSLEEP	1
+#define HAVE_SYSCTLBYNAME 1
 
 /* enable iPhone version of Core Audio driver */
 #define SDL_AUDIO_DRIVER_COREAUDIOIPHONE 1

include/SDL_config_macosx.h

@@ -105,6 +105,7 @@
 #define HAVE_SIGACTION	1
 #define HAVE_SETJMP	1
 #define HAVE_NANOSLEEP	1
+#define HAVE_SYSCTLBYNAME 1
 
 /* Enable various audio drivers */
 #define SDL_AUDIO_DRIVER_COREAUDIO	1

include/SDL_cpuinfo.h

@@ -39,6 +39,11 @@ extern "C" {
 /* *INDENT-ON* */
 #endif
 
+/**
+ *  This function returns the number of CPU cores available.
+ */
+extern DECLSPEC int SDLCALL SDL_GetCPUCount(void);
+
 /**
  *  This function returns true if the CPU has the RDTSC instruction.
  */

src/thread/SDL_systhread.h

@@ -49,4 +49,5 @@ extern void SDL_SYS_SetupThread(void);
 extern void SDL_SYS_WaitThread(SDL_Thread * thread);
 
 #endif /* _SDL_systhread_h */
+
 /* vi: set ts=4 sw=4 expandtab: */

test/automated/platform/platform.c

@@ -155,6 +155,7 @@ int test_platform (void)
          "big"
 #endif
          );
+   SDL_ATprintVerbose( 1, "CPU count: %d\n", SDL_GetCPUCount());
    SDL_ATprintVerbose( 1, "Available extensions:\n" );
    SDL_ATprintVerbose( 1, "   RDTSC %s\n", SDL_HasRDTSC()? "detected" : "not detected" );
    SDL_ATprintVerbose( 1, "   MMX %s\n", SDL_HasMMX()? "detected" : "not detected" );

test/testplatform.c

@@ -134,6 +134,7 @@ int
 TestCPUInfo(SDL_bool verbose)
 {
     if (verbose) {
+        printf("CPU count: %d\n", SDL_GetCPUCount());
         printf("RDTSC %s\n", SDL_HasRDTSC()? "detected" : "not detected");
         printf("MMX %s\n", SDL_HasMMX()? "detected" : "not detected");
         printf("MMX Ext %s\n", SDL_HasMMXExt()? "detected" : "not detected");