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Replace the last CRITICAL_SECTION with SRWLOCK.

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We don't support Windows XP, so we can rely on SRWLOCK. Per
https://crbug.com/592752, SRWLOCKs are more efficient and less of a
hassle to use. We'd previously converted CRYPTO_MUTEX to SRWLOCK, but I
missed this one. Not that this one lock matters much, may as well. It's
less initialization code.

Change-Id: I7ae435be5202b0a19f42015c9abff932dc04dbc7
Reviewed-on: https://boringssl-review.googlesource.com/c/33445
Commit-Queue: David Benjamin <davidben@google.com>
Commit-Queue: Adam Langley <agl@google.com>
Reviewed-by: Adam Langley <agl@google.com>
This commit is contained in:
David Benjamin 2018-05-20 17:44:53 -04:00 committed by CQ bot account: commit-bot@chromium.org
parent 278b3120ee
commit eb7d5b69e9
1 changed files with 6 additions and 11 deletions
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17
crypto/thread_win.c
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@ -82,7 +82,7 @@ void CRYPTO_STATIC_MUTEX_unlock_write(struct CRYPTO_STATIC_MUTEX *lock) {
ReleaseSRWLockExclusive(&lock->lock);
}
static CRITICAL_SECTION g_destructors_lock;
static SRWLOCK g_destructors_lock = SRWLOCK_INIT;
static thread_local_destructor_t g_destructors[NUM_OPENSSL_THREAD_LOCALS];
static CRYPTO_once_t g_thread_local_init_once = CRYPTO_ONCE_INIT;
@ -90,10 +90,6 @@ static DWORD g_thread_local_key;
static int g_thread_local_failed;
static void thread_local_init(void) {
if (!InitializeCriticalSectionAndSpinCount(&g_destructors_lock, 0x400)) {
g_thread_local_failed = 1;
return;
}
g_thread_local_key = TlsAlloc();
g_thread_local_failed = (g_thread_local_key == TLS_OUT_OF_INDEXES);
}
@ -121,12 +117,11 @@ static void NTAPI thread_local_destructor(PVOID module, DWORD reason,
thread_local_destructor_t destructors[NUM_OPENSSL_THREAD_LOCALS];
EnterCriticalSection(&g_destructors_lock);
AcquireSRWLockExclusive(&g_destructors_lock);
OPENSSL_memcpy(destructors, g_destructors, sizeof(destructors));
LeaveCriticalSection(&g_destructors_lock);
ReleaseSRWLockExclusive(&g_destructors_lock);
unsigned i;
for (i = 0; i < NUM_OPENSSL_THREAD_LOCALS; i++) {
for (unsigned i = 0; i < NUM_OPENSSL_THREAD_LOCALS; i++) {
if (destructors[i] != NULL) {
destructors[i](pointers[i]);
}
@ -250,9 +245,9 @@ int CRYPTO_set_thread_local(thread_local_data_t index, void *value,
}
}
EnterCriticalSection(&g_destructors_lock);
AcquireSRWLockExclusive(&g_destructors_lock);
g_destructors[index] = destructor;
LeaveCriticalSection(&g_destructors_lock);
ReleaseSRWLockExclusive(&g_destructors_lock);
pointers[index] = value;
return 1;