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Update SDWebImagePrefetcher weak-strong dance code into weakify && strongify

This commit is contained in:
DreamPiggy 2019-03-21 19:46:25 +08:00
parent 08c6e22906
commit 57ad6853ed
1 changed files with 31 additions and 32 deletions
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63
SDWebImage/SDWebImagePrefetcher.m
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@ -107,39 +107,38 @@
- (void)startPrefetchWithToken:(SDWebImagePrefetchToken * _Nonnull)token {
NSPointerArray *operations = token.loadOperations;
for (NSURL *url in token.urls) {
__weak typeof(self) wself = self;
@weakify(self);
SDAsyncBlockOperation *prefetchOperation = [SDAsyncBlockOperation blockOperationWithBlock:^(SDAsyncBlockOperation * _Nonnull asyncOperation) {
__strong typeof(wself) strongSelf = wself;
if (!strongSelf || asyncOperation.isCancelled) {
return;
}
id<SDWebImageOperation> operation = [strongSelf.manager loadImageWithURL:url options:strongSelf.options context:strongSelf.context progress:nil completed:^(UIImage * _Nullable image, NSData * _Nullable data, NSError * _Nullable error, SDImageCacheType cacheType, BOOL finished, NSURL * _Nullable imageURL) {
__strong typeof(wself) sself = wself;
if (!sself) {
return;
}
if (!finished) {
return;
}
atomic_fetch_add_explicit(&(token->_finishedCount), 1, memory_order_relaxed);
if (error) {
// Add last failed
atomic_fetch_add_explicit(&(token->_skippedCount), 1, memory_order_relaxed);
}
// Current operation finished
[sself callProgressBlockForToken:token imageURL:imageURL];
if (atomic_load_explicit(&(token->_finishedCount), memory_order_relaxed) == token->_totalCount) {
// All finished
if (!atomic_flag_test_and_set_explicit(&(token->_isAllFinished), memory_order_relaxed)) {
[sself callCompletionBlockForToken:token];
[sself removeRunningToken:token];
}
}
[asyncOperation complete];
}];
@strongify(self);
if (!self || asyncOperation.isCancelled) {
return;
}
id<SDWebImageOperation> operation = [self.manager loadImageWithURL:url options:self.options context:self.context progress:nil completed:^(UIImage * _Nullable image, NSData * _Nullable data, NSError * _Nullable error, SDImageCacheType cacheType, BOOL finished, NSURL * _Nullable imageURL) {
@strongify(self);
if (!self) {
return;
}
if (!finished) {
return;
}
atomic_fetch_add_explicit(&(token->_finishedCount), 1, memory_order_relaxed);
if (error) {
// Add last failed
atomic_fetch_add_explicit(&(token->_skippedCount), 1, memory_order_relaxed);
}
// Current operation finished
[self callProgressBlockForToken:token imageURL:imageURL];
if (atomic_load_explicit(&(token->_finishedCount), memory_order_relaxed) == token->_totalCount) {
// All finished
if (!atomic_flag_test_and_set_explicit(&(token->_isAllFinished), memory_order_relaxed)) {
[self callCompletionBlockForToken:token];
[self removeRunningToken:token];
}
}
[asyncOperation complete];
}];
NSAssert(operation != nil, @"Operation should not be nil, [SDWebImageManager loadImageWithURL:options:context:progress:completed:] break prefetch logic");
@synchronized (token) {
[operations addPointer:(__bridge void *)operation];