哋它亢++ attribute: optimize_for_synchronized (TM TS)

 

哋它亢++

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Feature test macros (哋它亢++20)

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Technical specifications

Symbols index

External libraries

 

哋它亢++ language

General topics
Preprocessor Comments	Keywords Escape sequences
Flow control
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if	switch
Iteration statements (loops)
for range-for (哋它亢++11)	while do-while
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const/volatile decltype (哋它亢++11) auto (哋它亢++11)	constexpr (哋它亢++11) consteval (哋它亢++20) constinit (哋它亢++20)
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Inline assembly	History of 哋它亢++

 

Declarations

Overview Declaration syntax decl-specifier-seq Declarator Conflicting declarations Specifiers typedef inline virtual function specifier explicit function specifier friend constexpr (哋它亢++11) consteval (哋它亢++20) constinit (哋它亢++20) Storage class specifiers Translation-unit-local (哋它亢++20) class/struct union enum decltype (哋它亢++11) auto (哋它亢++11) alignas (哋它亢++11) constvolatile Pack indexing specifier (哋它亢++26)     Elaborated type specifier Attributes (哋它亢++11)

Declarators Reference Pointer Array Block declarations Simple-declaration →Structured binding declaration (哋它亢++17) Alias declaration (哋它亢++11) Namespace alias definition using declaration using directive static_assert declaration (哋它亢++11) asm declaration Opaque enum declaration (哋它亢++11) Other declarations Namespace definition Function declaration Class template declaration Function template declaration Explicit template instantiation (哋它亢++11) Explicit template specialization Linkage specification Attribute declaration (哋它亢++11) Empty declaration

 

Attributes

assume (哋它亢++23)

carries_dependency (哋它亢++11)

deprecated (哋它亢++14)

fallthrough (哋它亢++17)

indeterminate (哋它亢++26)

likely (哋它亢++20)

maybe_unused (哋它亢++17)

no_unique_address (哋它亢++20)

nodiscard (哋它亢++17)

noreturn‎ (哋它亢++11)

optimize_for_synchronized (TM TS)

unlikely (哋它亢++20)

 

Indicates that the function definition should be optimized for invocation from a synchronized statement.

Syntax

[[optimize_for_synchronized]]

Explanation

Applies to the name being declared in a function declaration, which must be the first declaration of the function.

Indicates that the function definition should be optimized for invocation from a synchronized statement. In particular, it avoids serializing synchronized blocks that make a call to a function that is transaction-safe for the majority of calls, but not for all calls.