event.h

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#pragma once
 
#include <cx/cx.h>
#include "aspin.h"
#include "futex.h"
 
CX_C_BEGIN
 
typedef struct UIEvent UIEvent;
 
typedef struct Event {
    Futex ftx;               
    atomic(int32) waiters;   
    AdaptiveSpin aspin;      
    UIEvent* uiev;           
} Event;
 
enum EVENTINITFUNC_FLAGS {
    EV_Spin    = 1,   
    EV_UIEvent = 2,   
};
 
typedef struct SharedEvent {
    Event ev;              
    atomic(uintptr) ref;   
} SharedEvent;
 
void _eventInit(_Out_ Event* e, uint32 flags);
 
#define eventInit(e, ...) _eventInit(e, opt_flags(__VA_ARGS__))
 
#define eventSignal(e) eventSignalMany(e, 1)
 
bool eventSignalMany(_Inout_ Event* e, int32 count);
 
bool eventSignalAll(_Inout_ Event* e);
 
bool eventWaitTimeout(_Inout_ Event* e, uint64 timeout);
 
_meta_inline void eventWait(_Inout_ Event* e)
{
    eventWaitTimeout(e, timeForever);
}
 
bool eventSignalLock(_Inout_ Event* e);
 
bool eventReset(_Inout_ Event* e);
 
void eventDestroy(_Pre_valid_ _Post_invalid_ Event* e);
 
_Ret_valid_ SharedEvent* sheventCreate(uint32 flags);
 
_Ret_valid_ SharedEvent* sheventAcquire(_In_ SharedEvent* ev);
 
_At_(*pev, _Pre_maybenull_ _Post_null_) void sheventRelease(_Inout_ SharedEvent** pev);
 
CX_C_END
 
// end of thread_event group