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nxdumptool/source/service_guard.h
2020-04-15 16:50:07 -04:00

52 lines
1.3 KiB
C

#pragma once
#include <switch.h>
typedef struct ServiceGuard {
Mutex mutex;
u32 refCount;
} ServiceGuard;
NX_INLINE bool serviceGuardBeginInit(ServiceGuard* g)
{
mutexLock(&g->mutex);
return (g->refCount++) == 0;
}
NX_INLINE Result serviceGuardEndInit(ServiceGuard* g, Result rc, void (*cleanupFunc)(void))
{
if (R_FAILED(rc)) {
cleanupFunc();
--g->refCount;
}
mutexUnlock(&g->mutex);
return rc;
}
NX_INLINE void serviceGuardExit(ServiceGuard* g, void (*cleanupFunc)(void))
{
mutexLock(&g->mutex);
if (g->refCount && (--g->refCount) == 0)
cleanupFunc();
mutexUnlock(&g->mutex);
}
#define NX_GENERATE_SERVICE_GUARD_PARAMS(name, _paramdecl, _parampass) \
\
static ServiceGuard g_##name##Guard = {0}; \
NX_INLINE Result _##name##Initialize _paramdecl; \
static void _##name##Cleanup(void); \
\
Result name##Initialize _paramdecl \
{ \
Result rc = 0; \
if (serviceGuardBeginInit(&g_##name##Guard)) \
rc = _##name##Initialize _parampass; \
return serviceGuardEndInit(&g_##name##Guard, rc, _##name##Cleanup); \
} \
\
void name##Exit(void) \
{ \
serviceGuardExit(&g_##name##Guard, _##name##Cleanup); \
}
#define NX_GENERATE_SERVICE_GUARD(name) NX_GENERATE_SERVICE_GUARD_PARAMS(name, (void), ())