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Minimize more thread contention

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This commit is contained in:
gingerBill
2025-09-10 19:30:32 +01:00
parent 21b1173076
commit a36a8722dc
10 changed files with 74 additions and 58 deletions
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10
src/threading.cpp
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@@ -448,9 +448,9 @@ gb_internal void semaphore_wait(Semaphore *s) {
}
#endif
static const int RWLOCK_WRITER = 1;
static const int RWLOCK_UPGRADED = 2;
static const int RWLOCK_READER = 4;
static const int RWLOCK_WRITER = 1<<0;
static const int RWLOCK_UPGRADED = 1<<1;
static const int RWLOCK_READER = 1<<2;
struct RWSpinLock {
Futex bits;
};
@@ -467,7 +467,7 @@ bool rwlock_try_acquire_upgrade(RWSpinLock *l) {
void rwlock_acquire_upgrade(RWSpinLock *l) {
while (!rwlock_try_acquire_upgrade(l)) {
futex_wait(&l->bits, RWLOCK_UPGRADED);
futex_wait(&l->bits, RWLOCK_UPGRADED | RWLOCK_WRITER);
}
}
void rwlock_release_upgrade(RWSpinLock *l) {
@@ -481,7 +481,7 @@ bool rwlock_try_release_upgrade_and_acquire_write(RWSpinLock *l) {
void rwlock_release_upgrade_and_acquire_write(RWSpinLock *l) {
while (!rwlock_try_release_upgrade_and_acquire_write(l)) {
futex_wait(&l->bits, RWLOCK_WRITER);
futex_wait(&l->bits, RWLOCK_UPGRADED);
}
}