[PULL 10/51] bsd-user: Get number of cpus.

[Warner Losh]

From: Kyle Evans <kevans@FreeBSD.org>

Signed-off-by: Kyle Evans <kevans@FreeBSD.org>
Signed-off-by: Karim Taha <kariem.taha2.7@gmail.com>
Reviewed-by: Warner Losh <imp@bsdimp.com>
Message-Id: <20230925182425.3163-11-kariem.taha2.7@gmail.com>
---
 bsd-user/bsd-proc.c | 24 ++++++++++++++++++++++++
 bsd-user/bsd-proc.h |  2 ++
 2 files changed, 26 insertions(+)

diff --git a/bsd-user/bsd-proc.c b/bsd-user/bsd-proc.c
index 19f6efe1f78..ca3c1bf94f4 100644
--- 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;
+}
+
diff --git a/bsd-user/bsd-proc.h b/bsd-user/bsd-proc.h
index 048773a75dd..b6225e520ea 100644
--- a/bsd-user/bsd-proc.h
+++ b/bsd-user/bsd-proc.h
@@ -26,6 +26,8 @@
 #include "gdbstub/syscalls.h"
 #include "qemu/plugin.h"
 
+int bsd_get_ncpu(void);
+
 /* exit(2) */
 static inline abi_long do_bsd_exit(void *cpu_env, abi_long arg1)
 {
-- 
2.41.0