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initial signal implementation

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This commit is contained in:
Matheus
2024-05-14 15:04:48 -03:00
parent 00c212fa8d
commit 7b0cc4c51b
22 changed files with 824 additions and 55 deletions
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kernel-src/sys/syscalls/waitpid.c
+8 -8
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@@ -19,7 +19,7 @@ syscallret_t syscall_waitpid(context_t *context, pid_t pid, int *status, int opt
thread_t *thread = _cpu()->thread;
proc_t *proc = thread->proc;
spinlock_acquire(&proc->lock);
MUTEX_ACQUIRE(&proc->mutex, false);
proc_t *prev = NULL;
proc_t *iterator = proc->child;
@@ -29,10 +29,10 @@ syscallret_t syscall_waitpid(context_t *context, pid_t pid, int *status, int opt
if (iterator == NULL) {
if (pid > 0 && desired == NULL) {
ret.errno = ECHILD;
spinlock_release(&proc->lock);
MUTEX_RELEASE(&proc->mutex);
return ret;
}
spinlock_release(&proc->lock);
MUTEX_RELEASE(&proc->mutex);
if ((options & WNOHANG) && semaphore_test(&proc->waitsem) == false) {
ret.errno = 0;
ret.ret = 0;
@@ -41,7 +41,7 @@ syscallret_t syscall_waitpid(context_t *context, pid_t pid, int *status, int opt
ret.errno = EINTR;
return ret;
}
spinlock_acquire(&proc->lock);
MUTEX_ACQUIRE(&proc->mutex, false);
prev = NULL;
iterator = proc->child;
desired = NULL; // set as null to be certain another thread didn't get it
@@ -65,12 +65,12 @@ syscallret_t syscall_waitpid(context_t *context, pid_t pid, int *status, int opt
else
proc->child = iterator->sibling;
spinlock_release(&proc->lock);
MUTEX_RELEASE(&proc->mutex);
// TODO memory safe operation
// TODO the signal number goes in the low byte of status
if (status)
*status = iterator->status << 8;
if (status) {
*status = iterator->status;
}
for (int i = 0; i < iterator->threadtablesize; ++i) {
if (iterator->threads[i] == NULL)