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EPOS

Experimental Protected-mode Operating System

sync.h
/*
EPOS
http://www.atanaslaskov.com/epos/

FILE:          synch.h
DESCRIPTION:   Synchronisation events
 
BSD LICENSE
Copyright (c) 2006, Atanas Laskov
All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:
   1. Redistributions of source code must retain the above copyright notice,
   this list of conditions and the following disclaimer.
   2. Redistributions in binary form must reproduce the above copyright notice,
   this list of conditions and the following disclaimer in the documentation
   and/or other materials provided with the distribution.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
DISCLAIMED. IN NO EVENT SHALL ATANAS LASKOV BE LIABLE FOR ANY
DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/

#ifndef SYNC_H
#define SYNC_H

// Defaults
//
#define SY_MAX_EVENT_CNT (MAX_PROCESS_CNT*10)

#define SYSTATE   unsigned char

#define SY_S_OK              0
#define SY_S_OUTOFRESOURCES  1
#define SY_S_INVALIDHANDLE   2
#define SY_S_NOSUCHEVENT     3

#define SYHEVENT unsigned long

#define SY_IRQ 0

// Data types
//
struct SYEvent{
    unsigned long   dwEvent;
    struct PAddress paRaiser; //Valid when waiting
    SYHEVENT hEvent;          //Valid when creating
    SYHEVENT *pHandle;
    SYSTATE st;
};

struct SYEventHandle{
    SYHEVENT hEvent;
    struct PAddress paResetAccess; //Valid when raising (=PID_KERNEL => no access)
    SYSTATE st;
};

struct SYCount{
    unsigned long dwCnt;
    SYSTATE st;
};

// Kernel internals
//
void k_syInit();
void k_syThisEventIsKernels(SYHEVENT hEvent);

// Events
//
void syCreateEvent(struct SYEvent *p);
void syDeleteEvent(struct SYEventHandle *p);
void syWaitEvent(struct SYEvent *p);
void syRaiseEvent(struct SYEventHandle *p);
void syResetEvent(struct SYEventHandle *p);

// Timing
//
void syGetMiliseconds(struct SYCount *p);

#endif