new: mutex

kernel/common/sys/wait.c

@@ -0,0 +1,15 @@
+#include <syscall/syscall_num.h>
+#include <syscall/syscall.h>
+
+/**
+ * @brief 等待指定pid的子进程退出
+ *
+ * @param pid 子进程的pid
+ * @param stat_loc 返回的子进程结束状态
+ * @param options 额外的控制选项
+ * @return pid_t
+ */
+pid_t waitpid(pid_t pid, int *stat_loc, int options)
+{
+    return (pid_t)enter_syscall_int(SYS_WAIT4, (uint64_t)pid, (uint64_t)stat_loc, options, 0, 0, 0, 0, 0);
+}