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Use AtomicStore() when setting the mem0.nearlyFull boolean to avoid

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harmless TSAN warnings and to forestall doubts about threadsafety.

FossilOrigin-Name: ce980af65a9b528f112baa22a95020a98ac5340155a0b53b09c46f99aad9b12b
This commit is contained in:
drh
2020-04-28 14:01:31 +00:00
parent 9f603fcefd
commit 23bef340be
3 changed files with 10 additions and 10 deletions
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6
src/malloc.c
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@@ -111,7 +111,7 @@ sqlite3_int64 sqlite3_soft_heap_limit64(sqlite3_int64 n){
}
mem0.alarmThreshold = n;
nUsed = sqlite3StatusValue(SQLITE_STATUS_MEMORY_USED);
mem0.nearlyFull = (n>0 && n<=nUsed);
AtomicStore(&mem0.nearlyFull, n>0 && n<=nUsed);
sqlite3_mutex_leave(mem0.mutex);
excess = sqlite3_memory_used() - n;
if( excess>0 ) sqlite3_release_memory((int)(excess & 0x7fffffff));
@@ -243,7 +243,7 @@ static void mallocWithAlarm(int n, void **pp){
if( mem0.alarmThreshold>0 ){
sqlite3_int64 nUsed = sqlite3StatusValue(SQLITE_STATUS_MEMORY_USED);
if( nUsed >= mem0.alarmThreshold - nFull ){
mem0.nearlyFull = 1;
AtomicStore(&mem0.nearlyFull, 1);
sqlite3MallocAlarm(nFull);
if( mem0.hardLimit ){
nUsed = sqlite3StatusValue(SQLITE_STATUS_MEMORY_USED);
@@ -253,7 +253,7 @@ static void mallocWithAlarm(int n, void **pp){
}
}
}else{
mem0.nearlyFull = 0;
AtomicStore(&mem0.nearlyFull, 0);
}
}
p = sqlite3GlobalConfig.m.xMalloc(nFull);