nvscievent.h

Go to the documentation of this file.

/*
 * Copyright (c) 2019-2022, NVIDIA CORPORATION.  All rights reserved.
 *
 * NVIDIA CORPORATION and its licensors retain all intellectual property
 * and proprietary rights in and to this software, related documentation
 * and any modifications thereto.  Any use, reproduction, disclosure or
 * distribution of this software and related documentation without an express
 * license agreement from NVIDIA CORPORATION is strictly prohibited.
 */
 
#ifndef INCLUDED_NVSCIEVENT_H
#define INCLUDED_NVSCIEVENT_H
 
#ifdef __cplusplus
extern "C" {
#endif
 
#include <string.h>
#include <stdint.h>
#include <stdlib.h>
#include <stdbool.h>
#include <nvscierror.h>
 
/* use constant global version variable instead of macro for consistency with
 * version check API of existing NvSci family
 */
 
static const uint32_t NvSciEventMajorVersion = 1U;
 
static const uint32_t NvSciEventMinorVersion = 0U;
 
/*****************************************************************************/
/*                               DATA TYPES                                  */
/*****************************************************************************/
 
#define NV_SCI_EVENT_INFINITE_WAIT -1
#define NV_SCI_EVENT_PRIORITIES 4
 
typedef struct NvSciEventService NvSciEventService;
typedef struct NvSciEventNotifier NvSciEventNotifier;
typedef struct NvSciEventLoopService NvSciEventLoopService;
 
typedef struct NvSciNativeEvent NvSciNativeEvent;
typedef struct NvSciLocalEvent NvSciLocalEvent;
typedef struct NvSciTimerEvent NvSciTimerEvent;
typedef struct NvSciEventLoop NvSciEventLoop;
 
struct NvSciEventService {
    NvSciError (*CreateNativeEventNotifier)(
            NvSciEventService* thisEventService,
            NvSciNativeEvent* nativeEvent,
            NvSciEventNotifier** newEventNotifier);
 
    NvSciError (*CreateLocalEvent)(
            NvSciEventService* thisEventService,
            NvSciLocalEvent** newLocalEvent);
 
    NvSciError (*CreateTimerEvent)(
            NvSciEventService* thisEventService,
            NvSciTimerEvent** newTimerEvent);
 
    void (*Delete)(NvSciEventService* thisEventService);
};
 
struct NvSciEventNotifier {
    NvSciError (*SetHandler)(NvSciEventNotifier* thisEventNotifier,
            void (*callback)(void* cookie),
            void* cookie,
            uint32_t priority);
 
    void (*Delete)(NvSciEventNotifier* thisEventNotifier);
};
 
NvSciError NvSciEventLoopServiceCreate(
        size_t maxEventLoops,
        NvSciEventLoopService** newEventLoopService);
 
NvSciError NvSciEventLoopServiceCreateSafe(
        size_t maxEventLoops,
        void* config,
        NvSciEventLoopService** newEventLoopService);
 
struct NvSciEventLoopService {
    NvSciEventService EventService;
 
    NvSciError (*CreateEventLoop)(NvSciEventLoopService* eventLoopService,
            NvSciEventLoop** eventLoop);
 
    NvSciError (*WaitForEvent)(
            NvSciEventNotifier* eventNotifier,
            int64_t microseconds);
 
    NvSciError (*WaitForMultipleEvents)(
            NvSciEventNotifier* const * eventNotifierArray,
            size_t eventNotifierCount,
            int64_t microseconds,
            bool* newEventArray);
 
    NvSciError (*WaitForMultipleEventsExt)(
            NvSciEventService *eventService,
            NvSciEventNotifier* const * eventNotifierArray,
            size_t eventNotifierCount,
            int64_t microseconds,
            bool* newEventArray);
};
 
#ifdef __QNX__
 
NvSciError NvSciEventInspect(
        NvSciEventService *thisEventSerivce,
        uint32_t numEvents,
        uint32_t eventNotifierCount,
        NvSciEventNotifier** eventNotifierArray);
#endif /* __QNX__ */
 
/*
 * \brief Checks if loaded NvSciEvent library version is compatible with
 * the version the application was compiled against.
 *
 * This function checks loaded NvSciEvent library version with input NvSciEvent
 * library version and sets output variable true provided major version of the
 * loaded library is same as @a majorVer and minor version of the
 * loaded library is not less than @a minorVer, else sets output to false
 *
 * @param[in]  majorVer build major version.
 * @param[in]  minorVer build minor version.
 * @param[out] isCompatible boolean value stating if loaded NvSciEvent library
 *             is compatible or not.
 *
 * @return ::NvSciError, the completion code of the operation:
 * - ::NvSciError_Success if successful.
 * - ::NvSciError_BadParameter if any of the following occurs:
 *      - @a isCompatible is NULL
 *
 * @pre None
 *
 * @usage
 * - Allowed context for the API call
 *   - Interrupt: No
 *   - Signal handler: No
 *   - Thread-safe: Yes
 *   - Async/Sync: Sync
 * - Required Privileges(QNX): None
 * - API Group
 *   - Init: Yes
 *   - Runtime: Yes
 *   - De-Init: Yes
 */
NvSciError NvSciEventCheckVersionCompatibility(
    uint32_t majorVer,
    uint32_t minorVer,
    bool* isCompatible);
 
#ifdef __cplusplus
}
#endif
#endif /* INCLUDED_NVSCIEVENT_H */