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Fix minor suboptimalities in memory manager

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Justine Tunney 2024-07-18 19:19:51 -07:00
parent 76cea6c687
commit 23dfb79d33
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GPG key ID: BE714B4575D6E328
3 changed files with 49 additions and 60 deletions
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5
libc/intrin/maps.c
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@ -89,7 +89,7 @@ privileged bool __maps_lock(void) {
if (!__tls_enabled)
return false;
tib = __get_tls_privileged();
if (tib->tib_relock_maps++)
if (atomic_fetch_add_explicit(&tib->tib_relock_maps, 1, memory_order_relaxed))
return true;
while (atomic_exchange_explicit(&__maps.lock, 1, memory_order_acquire)) {
#if defined(__GNUC__) && defined(__aarch64__)
@ -106,6 +106,7 @@ privileged void __maps_unlock(void) {
if (!__tls_enabled)
return;
tib = __get_tls_privileged();
if (!--tib->tib_relock_maps)
if (atomic_fetch_sub_explicit(&tib->tib_relock_maps, 1,
memory_order_relaxed) == 1)
atomic_store_explicit(&__maps.lock, 0, memory_order_release);
}