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* Don't try to strdup() the name given for an unnamed semaphore.

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* When initializing an unnamed semaphore failed, it would be deleted
  twice.
* The user structure pointer wasn't correctly passed when initializing
  named semaphores.
* When opening a named semaphore failed after it has already been
  published, it is now unlinked again.
* The timeout passed to sem_timedwait() is relative to the Epoch. We
  need to offset to system time.
* Added TODO regarding a per team semaphore limit.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@25345 a95241bf-73f2-0310-859d-f6bbb57e9c96
This commit is contained in:
Ingo Weinhold 2008-05-07 12:10:38 +00:00
parent e16627cede
commit c00931f204
1 changed files with 16 additions and 8 deletions
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24
src/system/kernel/posix/realtime_sem.cpp
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@ -15,6 +15,7 @@
#include <fs/KPath.h>
#include <kernel.h>
#include <lock.h>
#include <real_time_clock.h>
#include <syscall_restart.h>
#include <team.h>
#include <thread.h>
@ -46,9 +47,11 @@ public:
status_t Init(const char* name, mode_t mode, int32 semCount)
{
fName = strdup(name);
if (fName == NULL)
return B_NO_MEMORY;
if (name != NULL) {
fName = strdup(name);
if (fName == NULL)
return B_NO_MEMORY;
}
fID = create_sem(semCount, name);
if (fID < 0)
@ -171,6 +174,7 @@ public:
return ENOENT;
// does not exist yet -- create
// TODO: Enforce per team semaphore limit!
sem = new(std::nothrow) SemInfo;
if (sem == NULL)
return B_NO_MEMORY;
@ -362,16 +366,15 @@ struct realtime_sem_context {
status_t CreateAnonymousSem(uint32 semCount, int& _id)
{
// TODO: Enforce per team semaphore limit!
SemInfo* sem = new(std::nothrow) SemInfo;
if (sem == NULL)
return B_NO_MEMORY;
ObjectDeleter<SemInfo> semDeleter(sem);
status_t error = sem->Init(NULL, 0, semCount);
if (error != B_OK) {
delete sem;
if (error != B_OK)
return error;
}
TeamSemInfo* teamSem = new(std::nothrow) TeamSemInfo(sem, NULL);
if (teamSem == NULL)
@ -414,15 +417,19 @@ struct realtime_sem_context {
}
// not open yet -- create a new team sem
teamSem = new(std::nothrow) TeamSemInfo(sem, NULL);
teamSem = new(std::nothrow) TeamSemInfo(sem, userSem);
if (teamSem == NULL) {
sem->ReleaseReference();
if (_created)
sSemTable.UnlinkSem(name);
return B_NO_MEMORY;
}
error = fSemaphores.Insert(teamSem);
if (error != B_OK) {
delete teamSem;
if (_created)
sSemTable.UnlinkSem(name);
return error;
}
@ -469,7 +476,8 @@ struct realtime_sem_context {
error = acquire_sem_etc(id, 1, B_CAN_INTERRUPT, 0);
} else {
error = acquire_sem_etc(id, 1, B_CAN_INTERRUPT | B_ABSOLUTE_TIMEOUT,
timeout);
timeout - rtc_boot_time());
// The given absolute timeout is relative to the Epoch.
}
return error == B_BAD_SEM_ID ? B_BAD_VALUE : error;