kopia lustrzana https://github.com/espressif/esp-idf
Merge branch 'bugfix/correct_clang_atomics' into 'master'
newlib,clang: implement __sync_* atomics for clang/llvm toolchain. Closes LLVM-92 See merge request espressif/esp-idf!14269pull/7307/head
commit
ca51cd67a4
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@ -75,6 +75,24 @@ static portMUX_TYPE s_atomic_lock = portMUX_INITIALIZER_UNLOCKED;
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#endif // SOC_CPU_CORES_NUM
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#ifdef __clang__
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// Clang doesn't allow to define "__sync_*" atomics. The workaround is to define function with name "__sync_*_builtin",
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// which implements "__sync_*" atomic functionality and use asm directive to set the value of symbol "__sync_*" to the name
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// of defined function.
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#define CLANG_ATOMIC_SUFFIX(name_) name_ ## _builtin
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#define CLANG_DECLARE_ALIAS(name_) \
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__asm__(".type " # name_ ", @function\n" \
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".global " #name_ "\n" \
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".equ " #name_ ", " #name_ "_builtin");
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#else // __clang__
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#define CLANG_ATOMIC_SUFFIX(name_) name_
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#define CLANG_DECLARE_ALIAS(name_)
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#endif // __clang__
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#define ATOMIC_LOAD(n, type) type __atomic_load_ ## n (const type* mem, int memorder) \
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{ \
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unsigned state = _ATOMIC_ENTER_CRITICAL(); \
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@ -158,12 +176,14 @@ static portMUX_TYPE s_atomic_lock = portMUX_INITIALIZER_UNLOCKED;
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return ret; \
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}
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#define SYNC_FETCH_OP(op, n, type) type __sync_fetch_and_ ## op ##_ ## n (type* ptr, type value) \
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{ \
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return __atomic_fetch_ ## op ##_ ## n (ptr, value, __ATOMIC_SEQ_CST); \
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}
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#define SYNC_BOOL_CMP_EXCHANGE(n, type) bool __sync_bool_compare_and_swap_ ## n (type *ptr, type oldval, type newval) \
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#define SYNC_FETCH_OP(op, n, type) type CLANG_ATOMIC_SUFFIX(__sync_fetch_and_ ## op ##_ ## n) (type* ptr, type value) \
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{ \
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return __atomic_fetch_ ## op ##_ ## n (ptr, value, __ATOMIC_SEQ_CST); \
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} \
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CLANG_DECLARE_ALIAS( __sync_fetch_and_ ## op ##_ ## n )
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#define SYNC_BOOL_CMP_EXCHANGE(n, type) bool CLANG_ATOMIC_SUFFIX(__sync_bool_compare_and_swap_ ## n) (type *ptr, type oldval, type newval) \
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{ \
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bool ret = false; \
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unsigned state = _ATOMIC_ENTER_CRITICAL(); \
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@ -173,9 +193,10 @@ static portMUX_TYPE s_atomic_lock = portMUX_INITIALIZER_UNLOCKED;
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} \
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_ATOMIC_EXIT_CRITICAL(state); \
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return ret; \
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}
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} \
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CLANG_DECLARE_ALIAS( __sync_bool_compare_and_swap_ ## n )
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#define SYNC_VAL_CMP_EXCHANGE(n, type) type __sync_val_compare_and_swap_ ## n (type *ptr, type oldval, type newval) \
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#define SYNC_VAL_CMP_EXCHANGE(n, type) type CLANG_ATOMIC_SUFFIX(__sync_val_compare_and_swap_ ## n) (type *ptr, type oldval, type newval) \
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{ \
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unsigned state = _ATOMIC_ENTER_CRITICAL(); \
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type ret = *ptr; \
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@ -184,7 +205,9 @@ static portMUX_TYPE s_atomic_lock = portMUX_INITIALIZER_UNLOCKED;
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} \
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_ATOMIC_EXIT_CRITICAL(state); \
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return ret; \
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}
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} \
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CLANG_DECLARE_ALIAS( __sync_val_compare_and_swap_ ## n )
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#if !HAS_ATOMICS_32
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