mirror of
https://github.com/DarkMatterCore/nxdumptool.git
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78 lines
2.2 KiB
C
78 lines
2.2 KiB
C
/*
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* service_guard.h
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*
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* Copyright (c) 2018-2020, Switchbrew and libnx contributors.
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* Copyright (c) 2020-2021, DarkMatterCore <pabloacurielz@gmail.com>.
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*
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* This file is part of nxdumptool (https://github.com/DarkMatterCore/nxdumptool).
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*
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* nxdumptool is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* nxdumptool is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <https://www.gnu.org/licenses/>.
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*/
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#pragma once
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#ifndef __SERVICE_GUARD_H__
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#define __SERVICE_GUARD_H__
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typedef struct ServiceGuard {
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Mutex mutex;
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u32 refCount;
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} ServiceGuard;
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NX_INLINE bool serviceGuardBeginInit(ServiceGuard* g)
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{
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mutexLock(&g->mutex);
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return (g->refCount++) == 0;
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}
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NX_INLINE Result serviceGuardEndInit(ServiceGuard* g, Result rc, void (*cleanupFunc)(void))
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{
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if (R_FAILED(rc)) {
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cleanupFunc();
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--g->refCount;
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}
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mutexUnlock(&g->mutex);
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return rc;
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}
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NX_INLINE void serviceGuardExit(ServiceGuard* g, void (*cleanupFunc)(void))
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{
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mutexLock(&g->mutex);
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if (g->refCount && (--g->refCount) == 0)
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cleanupFunc();
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mutexUnlock(&g->mutex);
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}
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#define NX_GENERATE_SERVICE_GUARD_PARAMS(name, _paramdecl, _parampass) \
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\
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static ServiceGuard g_##name##Guard = {0}; \
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NX_INLINE Result _##name##Initialize _paramdecl; \
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static void _##name##Cleanup(void); \
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\
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Result name##Initialize _paramdecl \
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{ \
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Result rc = 0; \
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if (serviceGuardBeginInit(&g_##name##Guard)) \
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rc = _##name##Initialize _parampass; \
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return serviceGuardEndInit(&g_##name##Guard, rc, _##name##Cleanup); \
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} \
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\
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void name##Exit(void) \
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{ \
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serviceGuardExit(&g_##name##Guard, _##name##Cleanup); \
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}
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#define NX_GENERATE_SERVICE_GUARD(name) NX_GENERATE_SERVICE_GUARD_PARAMS(name, (void), ())
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#endif /* __SERVICE_GUARD_H__ */
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