Various changes.

Separate a few reusable components from XZ Utils specific
code. The reusable code is now in "tuklib" modules. A few
more could be separated still, e.g. bswap.h.

Fix some bugs in lzmainfo.

Fix physmem and cpucores code on OS/2. Thanks to Elbert Pol
for help.

Add OpenVMS support into physmem. Add a few #ifdefs to ease
building XZ Utils on OpenVMS. Thanks to Jouk Jansen for the
original patch.

1 files changed, 46 insertions, 0 deletions

diff --git a/src/common/tuklib_cpucores.c b/src/common/tuklib_cpucores.c
new file mode 100644
index 00000000..0a8081ff
--- /dev/null
+++ b/src/common/tuklib_cpucores.c
@@ -0,0 +1,46 @@
+///////////////////////////////////////////////////////////////////////////////
+//
+/// \file       tuklib_cpucores.c
+/// \brief      Get the number of CPU cores online
+//
+//  Author:     Lasse Collin
+//
+//  This file has been put into the public domain.
+//  You can do whatever you want with this file.
+//
+///////////////////////////////////////////////////////////////////////////////
+
+#include "tuklib_cpucores.h"
+
+#if defined(TUKLIB_CPUCORES_SYSCTL)
+#	ifdef HAVE_SYS_PARAM_H
+#		include <sys/param.h>
+#	endif
+#	include <sys/sysctl.h>
+
+#elif defined(TUKLIB_CPUCORES_SYSCONF)
+#	include <unistd.h>
+#endif
+
+
+extern uint32_t
+tuklib_cpucores(void)
+{
+	uint32_t ret = 0;
+
+#if defined(TUKLIB_CPUCORES_SYSCTL)
+	int name[2] = { CTL_HW, HW_NCPU };
+	int cpus;
+	size_t cpus_size = sizeof(cpus);
+	if (sysctl(name, 2, &cpus, &cpus_size, NULL, 0) != -1
+			&& cpus_size == sizeof(cpus) && cpus > 0)
+		ret = (uint32_t)cpus;
+
+#elif defined(TUKLIB_CPUCORES_SYSCONF)
+	const long cpus = sysconf(_SC_NPROCESSORS_ONLN);
+	if (cpus > 0)
+		ret = (uint32_t)cpus;
+#endif
+
+	return ret;
+}