/*
** Deprecated external interface. Internal/core SQLite code
** should call sqlite3MemoryAlarm.
*/
int sqlite3_memory_alarm(
void(*xCallback)(void *pArg, sqlite3_int64 used,int N),
void *pArg,
sqlite3_int64 iThreshold
){
return sqlite3MemoryAlarm(xCallback, pArg, iThreshold);
}
sqlite3_int64 sqlite3_soft_heap_limit64(sqlite3_int64 n){
sqlite3_int64 priorLimit;
sqlite3_int64 excess;
#ifndef SQLITE_OMIT_AUTOINIT
sqlite3_initialize();
#endif
sqlite3_mutex_enter(mem0.mutex);
priorLimit = mem0.alarmThreshold;
sqlite3_mutex_leave(mem0.mutex);
if( n<0 ) return priorLimit;
if( n>0 ){
sqlite3MemoryAlarm(softHeapLimitEnforcer, 0, n);
}else{
sqlite3MemoryAlarm(0, 0, 0);
}
excess = sqlite3_memory_used() - n;
if( excess>0 ) sqlite3_release_memory((int)(excess & 0x7fffffff));
return priorLimit;
}
/*
** Set the soft heap-size limit for the library. Passing a zero or
** negative value indicates no limit.
*/
void sqlite3_soft_heap_limit(int n){
sqlite3_uint64 iLimit;
int overage;
if( n<0 ){
iLimit = 0;
}else{
iLimit = n;
}
sqlite3_initialize();
if( iLimit>0 ){
sqlite3MemoryAlarm(softHeapLimitEnforcer, 0, iLimit);
}else{
sqlite3MemoryAlarm(0, 0, 0);
}
overage = (int)(sqlite3_memory_used() - (i64)n);
if( overage>0 ){
sqlite3_release_memory(overage);
}
}
