bsd-user: Implement rfork(2) system call.

[mirror_qemu.git] / bsd-user / bsd-proc.c

diff --git a/bsd-user/bsd-proc.c b/bsd-user/bsd-proc.c
index 19f6efe1f78dc73c8ea8143ca693a289d7795520..ca3c1bf94f4a9a790c8af3358877d44f295e9946 100644 (file)
--- a/bsd-user/bsd-proc.c
+++ b/bsd-user/bsd-proc.c
@@ -119,3 +119,27 @@ int host_to_target_waitstatus(int status)
     return status;
 }
 
+int bsd_get_ncpu(void)
+{
+    int ncpu = -1;
+    cpuset_t mask;
+
+    CPU_ZERO(&mask);
+
+    if (cpuset_getaffinity(CPU_LEVEL_WHICH, CPU_WHICH_TID, -1, sizeof(mask),
+                           &mask) == 0) {
+        ncpu = CPU_COUNT(&mask);
+    }
+
+    if (ncpu == -1) {
+        ncpu = sysconf(_SC_NPROCESSORS_ONLN);
+    }
+
+    if (ncpu == -1) {
+        gemu_log("XXX Missing bsd_get_ncpu() implementation\n");
+        ncpu = 1;
+    }
+
+    return ncpu;
+}
+