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kernel: Fix 0-delay sleeps blocking the thread forever

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This commit is contained in:
apio 2023-06-08 19:57:38 +02:00
parent 85896214ba
commit d0b65674e6
Signed by: apio
GPG Key ID: B8A7D06E42258954
2 changed files with 4 additions and 1 deletions
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3
kernel/src/sys/usleep.cpp
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@ -6,6 +6,9 @@ Result<u64> sys_usleep(Registers*, SyscallArgs args)
{ {
useconds_t us = (useconds_t)args[0]; useconds_t us = (useconds_t)args[0];
// FIXME: Allow usleep() to use a more precise resolution.
if (us < 1000) return 0;
kernel_sleep(us / 1000); kernel_sleep(us / 1000);
return 0; return 0;

2
kernel/src/thread/Scheduler.cpp
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@ -271,7 +271,7 @@ namespace Scheduler
{ {
if (thread->state == ThreadState::Sleeping) if (thread->state == ThreadState::Sleeping)
{ {
if (--thread->sleep_ticks_left == 0) thread->wake_up(); if (thread->sleep_ticks_left == 0 || --thread->sleep_ticks_left == 0) thread->wake_up();
} }
} }