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Merge pull request #51 from SDWebImage/feature_replace_semaphore_with_os_unfair_lock_and_spinlock 

Replace the dispatch semaphore into os_unfair_lock, copied from SDWebImage Core
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DreamPiggy 2020-12-14 14:50:20 +08:00 committed by GitHub
parent 049cc75315 ba51befd7c
commit 2021f7d3b2
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GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 48 additions and 5 deletions
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53
SDWebImageWebPCoder/Classes/SDImageWebPCoder.m
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@ -7,6 +7,10 @@
*/
#import "SDImageWebPCoder.h"
#import "SDWebImageWebPCoderDefine.h"
#import <Accelerate/Accelerate.h>
#import <os/lock.h>
#import <libkern/OSAtomic.h>
#if __has_include("webp/decode.h") && __has_include("webp/encode.h") && __has_include("webp/demux.h") && __has_include("webp/mux.h")
#import "webp/decode.h"
@ -22,8 +26,47 @@
@import libwebp;
#endif
#import <Accelerate/Accelerate.h>
#import "SDWebImageWebPCoderDefine.h"
#define SD_USE_OS_UNFAIR_LOCK TARGET_OS_MACCATALYST ||\
(__IPHONE_OS_VERSION_MIN_REQUIRED >= __IPHONE_10_0) ||\
(__MAC_OS_X_VERSION_MIN_REQUIRED >= __MAC_10_12) ||\
(__TV_OS_VERSION_MIN_REQUIRED >= __TVOS_10_0) ||\
(__WATCH_OS_VERSION_MIN_REQUIRED >= __WATCHOS_3_0)
#ifndef SD_LOCK_DECLARE
#if SD_USE_OS_UNFAIR_LOCK
#define SD_LOCK_DECLARE(lock) os_unfair_lock lock
#else
#define SD_LOCK_DECLARE(lock) os_unfair_lock lock API_AVAILABLE(ios(10.0), tvos(10), watchos(3), macos(10.12)); \
OSSpinLock lock##_deprecated;
#endif
#endif
#ifndef SD_LOCK_INIT
#if SD_USE_OS_UNFAIR_LOCK
#define SD_LOCK_INIT(lock) lock = OS_UNFAIR_LOCK_INIT
#else
#define SD_LOCK_INIT(lock) if (@available(iOS 10, tvOS 10, watchOS 3, macOS 10.12, *)) lock = OS_UNFAIR_LOCK_INIT; \
else lock##_deprecated = OS_SPINLOCK_INIT;
#endif
#endif
#ifndef SD_LOCK
#if SD_USE_OS_UNFAIR_LOCK
#define SD_LOCK(lock) os_unfair_lock_lock(&lock)
#else
#define SD_LOCK(lock) if (@available(iOS 10, tvOS 10, watchOS 3, macOS 10.12, *)) os_unfair_lock_lock(&lock); \
else OSSpinLockLock(&lock##_deprecated);
#endif
#endif
#ifndef SD_UNLOCK
#if SD_USE_OS_UNFAIR_LOCK
#define SD_UNLOCK(lock) os_unfair_lock_unlock(&lock)
#else
#define SD_UNLOCK(lock) if (@available(iOS 10, tvOS 10, watchOS 3, macOS 10.12, *)) os_unfair_lock_unlock(&lock); \
else OSSpinLockUnlock(&lock##_deprecated);
#endif
#endif
/// Calculate the actual thumnail pixel size
static CGSize SDCalculateThumbnailSize(CGSize fullSize, BOOL preserveAspectRatio, CGSize thumbnailSize) {
@ -99,7 +142,7 @@ static CGSize SDCalculateThumbnailSize(CGSize fullSize, BOOL preserveAspectRatio
BOOL _finished;
CGFloat _canvasWidth;
CGFloat _canvasHeight;
dispatch_semaphore_t _lock;
SD_LOCK_DECLARE(_lock);
NSUInteger _currentBlendIndex;
BOOL _preserveAspectRatio;
CGSize _thumbnailSize;
@ -292,7 +335,7 @@ static CGSize SDCalculateThumbnailSize(CGSize fullSize, BOOL preserveAspectRatio
}
_preserveAspectRatio = preserveAspectRatio;
_currentBlendIndex = NSNotFound;
_lock = dispatch_semaphore_create(1);
SD_LOCK_INIT(_lock);
}
return self;
}
@ -975,7 +1018,7 @@ static void FreeImageData(void *info, const void *data, size_t size) {
_demux = demuxer;
_imageData = data;
_currentBlendIndex = NSNotFound;
_lock = dispatch_semaphore_create(1);
SD_LOCK_INIT(_lock);
}
return self;
}