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-rw-r--r--libguile/threads.c34
1 files changed, 34 insertions, 0 deletions
diff --git a/libguile/threads.c b/libguile/threads.c
index 4de819395..f49696b1d 100644
--- a/libguile/threads.c
+++ b/libguile/threads.c
@@ -39,6 +39,7 @@
#endif
#include <assert.h>
+#include <nproc.h>
#include "libguile/validate.h"
#include "libguile/root.h"
@@ -2010,6 +2011,39 @@ scm_c_thread_exited_p (SCM thread)
}
#undef FUNC_NAME
+SCM_DEFINE (scm_total_processor_count, "total-processor-count", 0, 0, 0,
+ (void),
+ "Return the total number of processors of the machine, which\n"
+ "is guaranteed to be at least 1. A ``processor'' here is a\n"
+ "thread execution unit, which can be either:\n\n"
+ "@itemize\n"
+ "@item an execution core in a (possibly multi-core) chip, in a\n"
+ " (possibly multi- chip) module, in a single computer, or\n"
+ "@item a thread execution unit inside a core in the case of\n"
+ " @dfn{hyper-threaded} CPUs.\n"
+ "@end itemize\n\n"
+ "Which of the two definitions is used, is unspecified.\n")
+#define FUNC_NAME s_scm_total_processor_count
+{
+ return scm_from_ulong (num_processors (NPROC_ALL));
+}
+#undef FUNC_NAME
+
+SCM_DEFINE (scm_current_processor_count, "current-processor-count", 0, 0, 0,
+ (void),
+ "Like @code{total-processor-count}, but return the number of\n"
+ "processors available to the current process. See\n"
+ "@code{setaffinity} and @code{getaffinity} for more\n"
+ "information.\n")
+#define FUNC_NAME s_scm_current_processor_count
+{
+ return scm_from_ulong (num_processors (NPROC_CURRENT));
+}
+#undef FUNC_NAME
+
+
+
+
static scm_i_pthread_cond_t wake_up_cond;
static int threads_initialized_p = 0;