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Added support for the B_CHECK_PERMISSION flag - this one should really

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be private, as it serves no useful purpose outside of the kernel.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@11893 a95241bf-73f2-0310-859d-f6bbb57e9c96
This commit is contained in:
Axel Dörfler
2005-03-18 01:26:05 +00:00
parent 9391dd214d
commit 7860b7bfe7
1 changed files with 19 additions and 3 deletions
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src/kernel/core/sem.c
+19 -3
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@@ -429,7 +429,6 @@ status_t
switch_sem_etc(sem_id semToBeReleased, sem_id id, int32 count,
uint32 flags, bigtime_t timeout)
{
// ToDo: add support for B_CHECK_PERMISSION
int slot = id % sMaxSems;
int state;
status_t status = B_OK;
@@ -449,13 +448,22 @@ switch_sem_etc(sem_id semToBeReleased, sem_id id, int32 count,
state = disable_interrupts();
GRAB_SEM_LOCK(sSems[slot]);
if (sSems[slot].id != id) {
TRACE(("acquire_sem_etc: bad sem_id %ld\n", id));
status = B_BAD_SEM_ID;
goto err;
}
// ToDo: the B_CHECK_PERMISSION flag should be made private, as it
// doesn't have any use outside the kernel
if ((flags & B_CHECK_PERMISSION) != 0
&& sSems[slot].u.used.owner == team_get_kernel_team_id()) {
dprintf("thread %ld tried to acquire kernel semaphore.\n", thread_get_current_thread()->id);
status = B_NOT_ALLOWED;
goto err;
}
if (sSems[slot].u.used.count - count < 0 && (flags & B_RELATIVE_TIMEOUT) != 0
&& timeout <= 0) {
// immediate timeout
@@ -574,7 +582,6 @@ release_sem(sem_id id)
status_t
release_sem_etc(sem_id id, int32 count, uint32 flags)
{
// ToDo: add support for B_CHECK_PERMISSION
struct thread_queue releaseQueue;
int32 slot = id % sMaxSems;
cpu_status state;
@@ -596,6 +603,15 @@ release_sem_etc(sem_id id, int32 count, uint32 flags)
goto err;
}
// ToDo: the B_CHECK_PERMISSION flag should be made private, as it
// doesn't have any use outside the kernel
if ((flags & B_CHECK_PERMISSION) != 0
&& sSems[slot].u.used.owner == team_get_kernel_team_id()) {
dprintf("thread %ld tried to release kernel semaphore.\n", thread_get_current_thread()->id);
status = B_NOT_ALLOWED;
goto err;
}
// clear out a queue we will use to hold all of the threads that we will have to
// put back into the run list. This is done so the thread lock wont be held
// while this sems lock is held since the two locks are grabbed in the other