diff options
| -rw-r--r-- | src/liblzma/check/crc_common.h | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/src/liblzma/check/crc_common.h b/src/liblzma/check/crc_common.h index b0176adc..7aef383c 100644 --- a/src/liblzma/check/crc_common.h +++ b/src/liblzma/check/crc_common.h @@ -33,6 +33,21 @@ #endif +// The inline keyword is only a suggestion to the compiler to substitute the +// body of the function into the places where it is called. If a function +// is large and called multiple times then compiler may choose to ignore the +// inline suggestion at a sometimes high performance cost. +// +// MSVC's __forceinline is a keyword that should be used in place of inline. +// If both __forceinline and inline are used, MSVC will issue a warning. +// Since MSVC's keyword is a replacement keyword, the lzma_always_inline +// macro must also contain the inline keyword when its not used in MSVC. +#ifdef _MSC_VER +# define crc_always_inline __forceinline +#else +# define crc_always_inline __attribute__((__always_inline__)) inline +#endif + #undef CRC_GENERIC #undef CRC_CLMUL #undef CRC_USE_IFUNC |