perf_pmu.c

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/*
 * Copyright (c) 2013-2019 Huawei Technologies Co., Ltd. All rights reserved.
 * Copyright (c) 2020-2021 Huawei Device Co., Ltd. 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.
 *
 * 3. Neither the name of the copyright holder nor the names of its contributors may be used
 *    to endorse or promote products derived from this software without specific prior written
 *    permission.
 *
 * 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 THE COPYRIGHT HOLDER OR
 * CONTRIBUTORS 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.
 */
 
#include "perf_pmu_pri.h"
 
STATIC Pmu *g_pmuMgr[PERF_EVENT_TYPE_MAX] = { NULL };
 
UINT32 OsPerfPmuRegister(Pmu *pmu)
{
    UINT32 type;
 
    if ((pmu == NULL) || (pmu->type >= PERF_EVENT_TYPE_MAX)) {
        return LOS_NOK;
    }
 
    type = pmu->type;
    if (g_pmuMgr[type] == NULL) {
        g_pmuMgr[type] = pmu;
        return LOS_OK;
    }
    return LOS_NOK;
}
 
Pmu *OsPerfPmuGet(UINT32 type)
{
    if (type >= PERF_EVENT_TYPE_MAX) {
        return NULL;
    }
 
    if (type == PERF_EVENT_TYPE_RAW) { /* process hardware raw events with hard pmu */
        type = PERF_EVENT_TYPE_HW;
    }
    return g_pmuMgr[type];
}
 
VOID OsPerfPmuRm(UINT32 type)
{
    if (type >= PERF_EVENT_TYPE_MAX) {
        return;
    }
    g_pmuMgr[type] = NULL;
}