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- #if (defined(__IPHONE_OS_VERSION_MIN_REQUIRED) && (!defined(__IPHONE_6_0) || __IPHONE_OS_VERSION_MIN_REQUIRED < __IPHONE_6_0)) || \
- (defined(__MAC_OS_X_VERSION_MIN_REQUIRED) && (!defined(__MAC_10_8) || __MAC_OS_X_VERSION_MIN_REQUIRED < __MAC_10_8))
- #define PT_DISPATCH_RETAIN_RELEASE 1
- #else
- #define PT_DISPATCH_RETAIN_RELEASE 0
- #endif
- #if PT_DISPATCH_RETAIN_RELEASE
- #define PT_PRECISE_LIFETIME
- #define PT_PRECISE_LIFETIME_UNUSED
- #else
- #define PT_PRECISE_LIFETIME __attribute__((objc_precise_lifetime))
- #define PT_PRECISE_LIFETIME_UNUSED __attribute__((objc_precise_lifetime, unused))
- #endif
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