[0.96.0] merge MacOSX EXP tree into HEAD

git-svn-id: svn+ssh://jackaudio.org/trunk/jack@673 0c269be4-1314-0410-8aa9-9f06e86f4224

1 files changed, 97 insertions, 0 deletions

diff --git a/config/os/gnu-linux/time.h b/config/os/gnu-linux/time.h
new file mode 100644
index 0000000..033d4a6
--- /dev/null
+++ b/config/os/gnu-linux/time.h
@@ -0,0 +1,97 @@
+/*
+    Copyright (C) 2001-2003 Paul Davis
+
+    This is the GNU/Linux version.
+    
+    This program is free software; you can redistribute it and/or modify
+    it under the terms of the GNU Lesser General Public License as published by
+    the Free Software Foundation; either version 2.1 of the License, or
+    (at your option) any later version.
+    
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU Lesser General Public License for more details.
+    
+    You should have received a copy of the GNU Lesser General Public License
+    along with this program; if not, write to the Free Software 
+    Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+
+    $Id$
+*/
+#ifndef __jack_time_h__
+#define __jack_time_h__
+
+#include <stdio.h>
+#include <jack/internal.h>
+#include <sysdeps/cycles.h>
+
+/* This is a kludge.  We need one global instantiation of this
+ * variable in each address space.  So, libjack/client.c declares the
+ * actual storage.  Other source files will see it as an extern. */
+#define JACK_TIME_GLOBAL_DECL jack_time_t __jack_cpu_mhz
+extern JACK_TIME_GLOBAL_DECL;
+
+static inline jack_time_t 
+jack_get_microseconds (void) {
+	return get_cycles() / __jack_cpu_mhz;
+}
+
+/*
+ * This is another kludge.  It looks CPU-dependent, but actually it
+ * reflects the lack of standards for the Linux kernel formatting of
+ * /proc/cpuinfo.
+ */
+static inline jack_time_t
+jack_get_mhz (void)
+{
+	FILE *f = fopen("/proc/cpuinfo", "r");
+	if (f == 0)
+	{
+		perror("can't open /proc/cpuinfo\n");
+		exit(1);
+	}
+
+	for ( ; ; )
+	{
+		jack_time_t mhz;
+		int ret;
+		char buf[1000];
+
+		if (fgets(buf, sizeof(buf), f) == NULL) {
+			jack_error ("FATAL: cannot locate cpu MHz in "
+				    "/proc/cpuinfo\n");
+			exit(1);
+		}
+
+#if defined(__powerpc__)
+		ret = sscanf(buf, "clock\t: %" SCNu64 "MHz", &mhz);
+#elif defined( __i386__ ) || defined (__hppa__)  || defined (__ia64__) || \
+      defined(__x86_64__)
+		ret = sscanf(buf, "cpu MHz         : %" SCNu64, &mhz);
+#elif defined( __sparc__ )
+		ret = sscanf(buf, "Cpu0Bogo        : %" SCNu64, &mhz);
+#elif defined( __mc68000__ )
+		ret = sscanf(buf, "Clocking:       %" SCNu64, &mhz);
+#elif defined( __s390__  )
+		ret = sscanf(buf, "bogomips per cpu: %" SCNu64, &mhz);
+#else /* MIPS, ARM, alpha */
+		ret = sscanf(buf, "BogoMIPS        : %" SCNu64, &mhz);
+#endif 
+
+		if (ret == 1)
+		{
+			fclose(f);
+			return (jack_time_t)mhz;
+		}
+	}
+}
+
+/* This should only be called ONCE per process. */
+static inline void 
+jack_init_time ()
+{
+	__jack_cpu_mhz = jack_get_mhz ();
+}
+
+#endif /* __jack_time_h__ */