d5488b7703
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@27303 a95241bf-73f2-0310-859d-f6bbb57e9c96
134 lines
2.8 KiB
C++
134 lines
2.8 KiB
C++
/*
|
|
* Copyright 2007-2008, Ingo Weinhold, bonefish@cs.tu-berlin.de.
|
|
* Distributed under the terms of the MIT License.
|
|
*/
|
|
#ifndef _KERNEL_CONDITION_VARIABLE_H
|
|
#define _KERNEL_CONDITION_VARIABLE_H
|
|
|
|
|
|
#include <OS.h>
|
|
|
|
#include <debug.h>
|
|
|
|
#ifdef __cplusplus
|
|
|
|
#include <util/DoublyLinkedList.h>
|
|
#include <util/OpenHashTable.h>
|
|
|
|
|
|
class ConditionVariable;
|
|
|
|
|
|
struct ConditionVariableEntry
|
|
: DoublyLinkedListLinkImpl<ConditionVariableEntry> {
|
|
public:
|
|
#if KDEBUG
|
|
inline ConditionVariableEntry();
|
|
inline ~ConditionVariableEntry();
|
|
#endif
|
|
|
|
bool Add(const void* object);
|
|
status_t Wait(uint32 flags = 0, bigtime_t timeout = 0);
|
|
status_t Wait(const void* object, uint32 flags = 0,
|
|
bigtime_t timeout = 0);
|
|
|
|
inline ConditionVariable* Variable() const { return fVariable; }
|
|
|
|
private:
|
|
inline void AddToVariable(ConditionVariable* variable);
|
|
|
|
private:
|
|
ConditionVariable* fVariable;
|
|
struct thread* fThread;
|
|
status_t fWaitStatus;
|
|
|
|
friend class ConditionVariable;
|
|
};
|
|
|
|
|
|
class ConditionVariable : protected HashTableLink<ConditionVariable> {
|
|
public:
|
|
void Init(const void* object,
|
|
const char* objectType);
|
|
// for anonymous (unpublished) cvars
|
|
|
|
void Publish(const void* object,
|
|
const char* objectType);
|
|
void Unpublish(bool threadsLocked = false);
|
|
|
|
inline void NotifyOne(bool threadsLocked = false);
|
|
inline void NotifyAll(bool threadsLocked = false);
|
|
|
|
void Add(ConditionVariableEntry* entry);
|
|
|
|
status_t Wait(uint32 flags = 0, bigtime_t timeout = 0);
|
|
// all-in one, i.e. doesn't need a
|
|
// ConditionVariableEntry
|
|
|
|
const void* Object() const { return fObject; }
|
|
const char* ObjectType() const { return fObjectType; }
|
|
|
|
static void ListAll();
|
|
void Dump() const;
|
|
|
|
private:
|
|
void _Notify(bool all, bool threadsLocked);
|
|
void _NotifyChecked(bool all, status_t result);
|
|
|
|
protected:
|
|
typedef DoublyLinkedList<ConditionVariableEntry> EntryList;
|
|
|
|
const void* fObject;
|
|
const char* fObjectType;
|
|
EntryList fEntries;
|
|
|
|
friend class ConditionVariableEntry;
|
|
friend class ConditionVariableHashDefinition;
|
|
};
|
|
|
|
|
|
#if KDEBUG
|
|
|
|
inline
|
|
ConditionVariableEntry::ConditionVariableEntry()
|
|
: fVariable(NULL)
|
|
{
|
|
}
|
|
|
|
inline
|
|
ConditionVariableEntry::~ConditionVariableEntry()
|
|
{
|
|
if (fVariable != NULL) {
|
|
panic("Destroying condition variable entry %p, but it's still "
|
|
"attached to variable %p\n", this, fVariable);
|
|
}
|
|
}
|
|
|
|
#endif
|
|
|
|
|
|
inline void
|
|
ConditionVariable::NotifyOne(bool threadsLocked)
|
|
{
|
|
_Notify(false, threadsLocked);
|
|
}
|
|
|
|
|
|
inline void
|
|
ConditionVariable::NotifyAll(bool threadsLocked)
|
|
{
|
|
_Notify(true, threadsLocked);
|
|
}
|
|
|
|
|
|
extern "C" {
|
|
#endif // __cplusplus
|
|
|
|
extern void condition_variable_init();
|
|
|
|
#ifdef __cplusplus
|
|
} // extern "C"
|
|
#endif
|
|
|
|
#endif /* _KERNEL_CONDITION_VARIABLE_H */
|