Kernel/libc: sched_yield implementation and syscall

byteduck · Apr 20, 2024 · 3635f35 · 3635f35
1 parent f1e77ee
commit 3635f35
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Showing 3 changed files with 6 additions and 0 deletions.
diff --git a/kernel/syscall/syscall.cpp b/kernel/syscall/syscall.cpp
@@ -211,6 +211,9 @@ int handle_syscall(ThreadRegisters& regs, uint32_t call, uint32_t arg1, uint32_t
 			return cur_proc->sys_accept(arg1, (struct sockaddr*) arg2, (uint32_t*) arg3);
 		case SYS_FUTEX:
 			return cur_proc->sys_futex((int*) arg1, arg2);
+		case SYS_YIELD:
+			TaskManager::yield();
+			return 0;
 
 		//TODO: Implement these syscalls
 		case SYS_TIMES:

diff --git a/kernel/syscall/syscall_numbers.h b/kernel/syscall/syscall_numbers.h
@@ -91,6 +91,7 @@
 #define SYS_SHUTDOWN 88
 #define SYS_ACCEPT 89
 #define SYS_FUTEX 90
+#define SYS_YIELD 91
 
 #ifndef DUCKOS_KERNEL
 #include <sys/types.h>

diff --git a/libraries/libc/sched.c b/libraries/libc/sched.c
@@ -2,10 +2,12 @@
 /* Copyright © 2016-2024 Byteduck */
 
 #include "sched.h"
+#include "sys/syscall.h"
 
 // TODO
 
 int sched_yield() {
+	syscall(SYS_YIELD);
 	return 0;
 }