diff options
| author | Marvin Borner | 2020-09-07 00:17:04 +0200 |
|---|---|---|
| committer | Marvin Borner | 2020-09-07 00:17:04 +0200 |
| commit | 9c2f40441e0cc909ebefe432ddc10e2de29b82ac (patch) | |
| tree | 2dcdd4ae56faab40f4bbbee27e72023e3b8acdbb /kernel/features/syscall.c | |
| parent | 97f57cf4da45d268bbea863ae7bf40bb8c749aad (diff) | |
Added wait syscall.
This makes a process sleep until it receives a new message (no polling!).
I thought that this will result in performance improvements but I haven't
noticed any, yet. Maybe I'll remove this again in the future..
Diffstat (limited to 'kernel/features/syscall.c')
| -rw-r--r-- | kernel/features/syscall.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/kernel/features/syscall.c b/kernel/features/syscall.c index 25770a4..b3af455 100644 --- a/kernel/features/syscall.c +++ b/kernel/features/syscall.c @@ -17,7 +17,7 @@ void syscall_handler(struct regs *r) enum sys num = r->eax; r->eax = 0; - if (num != SYS_RECEIVE && num != SYS_YIELD && num != SYS_TIME) + if (num != SYS_RECEIVE && num != SYS_YIELD && num != SYS_WAIT && num != SYS_TIME) printf("[SYSCALL] %d from %s: ", num, proc_current()->name); switch (num) { @@ -74,6 +74,12 @@ void syscall_handler(struct regs *r) proc_yield(r); break; } + case SYS_WAIT: { + /* printf("wait\n"); */ + proc_current()->state = PROC_WAITING; + proc_yield(r); + break; + } case SYS_TIME: { /* printf("time\n"); */ r->eax = timer_get(); |