127 lines
2.9 KiB
C++
127 lines
2.9 KiB
C++
/*
|
|
* Copyright 2007-2011, Ingo Weinhold, ingo_weinhold@gmx.de.
|
|
* Copyright 2019, Haiku, Inc. All rights reserved.
|
|
* 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>
|
|
|
|
|
|
struct mutex;
|
|
struct recursive_lock;
|
|
struct ConditionVariable;
|
|
|
|
|
|
struct ConditionVariableEntry
|
|
: DoublyLinkedListLinkImpl<ConditionVariableEntry> {
|
|
public:
|
|
ConditionVariableEntry();
|
|
~ConditionVariableEntry();
|
|
|
|
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);
|
|
|
|
ConditionVariable* Variable() const;
|
|
|
|
private:
|
|
inline void _AddToLockedVariable(ConditionVariable* variable);
|
|
void _RemoveFromVariable();
|
|
|
|
private:
|
|
ConditionVariable* fVariable;
|
|
Thread* fThread;
|
|
status_t fWaitStatus;
|
|
|
|
friend struct ConditionVariable;
|
|
};
|
|
|
|
|
|
struct ConditionVariable {
|
|
public:
|
|
void Init(const void* object,
|
|
const char* objectType);
|
|
// for anonymous (unpublished) cvars
|
|
|
|
void Publish(const void* object,
|
|
const char* objectType);
|
|
void Unpublish();
|
|
|
|
inline void NotifyOne(status_t result = B_OK);
|
|
inline void NotifyAll(status_t result = B_OK);
|
|
|
|
static void NotifyOne(const void* object, status_t result);
|
|
static void NotifyAll(const void* object, status_t result);
|
|
|
|
void Add(ConditionVariableEntry* entry);
|
|
int32 EntriesCount() { return atomic_get(&fEntriesCount); }
|
|
|
|
// Convenience methods, no ConditionVariableEntry required.
|
|
status_t Wait(uint32 flags = 0, bigtime_t timeout = 0);
|
|
status_t Wait(mutex* lock, uint32 flags = 0, bigtime_t timeout = 0);
|
|
status_t Wait(recursive_lock* lock, uint32 flags = 0, bigtime_t timeout = 0);
|
|
|
|
const void* Object() const { return fObject; }
|
|
const char* ObjectType() const { return fObjectType; }
|
|
|
|
static void ListAll();
|
|
void Dump() const;
|
|
|
|
private:
|
|
static void _Notify(const void* object, bool all, status_t result);
|
|
void _Notify(bool all, status_t result);
|
|
void _NotifyLocked(bool all, status_t result);
|
|
|
|
protected:
|
|
typedef DoublyLinkedList<ConditionVariableEntry> EntryList;
|
|
|
|
const void* fObject;
|
|
const char* fObjectType;
|
|
|
|
spinlock fLock;
|
|
EntryList fEntries;
|
|
int32 fEntriesCount;
|
|
|
|
ConditionVariable* fNext;
|
|
|
|
friend struct ConditionVariableEntry;
|
|
friend struct ConditionVariableHashDefinition;
|
|
};
|
|
|
|
|
|
inline void
|
|
ConditionVariable::NotifyOne(status_t result)
|
|
{
|
|
_Notify(false, result);
|
|
}
|
|
|
|
|
|
inline void
|
|
ConditionVariable::NotifyAll(status_t result)
|
|
{
|
|
_Notify(true, result);
|
|
}
|
|
|
|
|
|
extern "C" {
|
|
#endif // __cplusplus
|
|
|
|
extern void condition_variable_init();
|
|
|
|
#ifdef __cplusplus
|
|
} // extern "C"
|
|
#endif
|
|
|
|
#endif /* _KERNEL_CONDITION_VARIABLE_H */
|