initial

2023-08-18 17:28:57 +08:00
commit f0e8a1709d
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+/*
+ * This file is part of the SDWebImage package.
+ * (c) Olivier Poitrey <rs@dailymotion.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+#import <Foundation/Foundation.h>
+#import <os/lock.h>
+#import <libkern/OSAtomic.h>
+#import "SDmetamacros.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_DECLARE_STATIC
+#if SD_USE_OS_UNFAIR_LOCK
+#define SD_LOCK_DECLARE_STATIC(lock) static os_unfair_lock lock
+#else
+#define SD_LOCK_DECLARE_STATIC(lock) static os_unfair_lock lock API_AVAILABLE(ios(10.0), tvos(10), watchos(3), macos(10.12)); \
+static 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
+
+#ifndef SD_OPTIONS_CONTAINS
+#define SD_OPTIONS_CONTAINS(options, value) (((options) & (value)) == (value))
+#endif
+
+#ifndef SD_CSTRING
+#define SD_CSTRING(str) #str
+#endif
+
+#ifndef SD_NSSTRING
+#define SD_NSSTRING(str) @(SD_CSTRING(str))
+#endif
+
+#ifndef SD_SEL_SPI
+#define SD_SEL_SPI(name) NSSelectorFromString([NSString stringWithFormat:@"_%@", SD_NSSTRING(name)])
+#endif
+
+#ifndef weakify
+#define weakify(...) \
+sd_keywordify \
+metamacro_foreach_cxt(sd_weakify_,, __weak, __VA_ARGS__)
+#endif
+
+#ifndef strongify
+#define strongify(...) \
+sd_keywordify \
+_Pragma("clang diagnostic push") \
+_Pragma("clang diagnostic ignored \"-Wshadow\"") \
+metamacro_foreach(sd_strongify_,, __VA_ARGS__) \
+_Pragma("clang diagnostic pop")
+#endif
+
+#define sd_weakify_(INDEX, CONTEXT, VAR) \
+CONTEXT __typeof__(VAR) metamacro_concat(VAR, _weak_) = (VAR);
+
+#define sd_strongify_(INDEX, VAR) \
+__strong __typeof__(VAR) VAR = metamacro_concat(VAR, _weak_);
+
+#if DEBUG
+#define sd_keywordify autoreleasepool {}
+#else
+#define sd_keywordify try {} @catch (...) {}
+#endif
+
+#ifndef onExit
+#define onExit \
+sd_keywordify \
+__strong sd_cleanupBlock_t metamacro_concat(sd_exitBlock_, __LINE__) __attribute__((cleanup(sd_executeCleanupBlock), unused)) = ^
+#endif
+
+typedef void (^sd_cleanupBlock_t)(void);
+
+#if defined(__cplusplus)
+extern "C" {
+#endif
+    void sd_executeCleanupBlock (__strong sd_cleanupBlock_t *block);
+#if defined(__cplusplus)
+}
+#endif