ac50c1e44b
In the process, we do a few local cleanups and optimizations. In particular, the size safety check on tcache flush no longer does a redundant load.
75 lines
1.5 KiB
C
75 lines
1.5 KiB
C
#ifndef JEMALLOC_INTERNAL_UTIL_H
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#define JEMALLOC_INTERNAL_UTIL_H
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#define UTIL_INLINE static inline
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/* Junk fill patterns. */
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#ifndef JEMALLOC_ALLOC_JUNK
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# define JEMALLOC_ALLOC_JUNK ((uint8_t)0xa5)
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#endif
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#ifndef JEMALLOC_FREE_JUNK
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# define JEMALLOC_FREE_JUNK ((uint8_t)0x5a)
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#endif
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/*
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* Wrap a cpp argument that contains commas such that it isn't broken up into
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* multiple arguments.
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*/
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#define JEMALLOC_ARG_CONCAT(...) __VA_ARGS__
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/* cpp macro definition stringification. */
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#define STRINGIFY_HELPER(x) #x
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#define STRINGIFY(x) STRINGIFY_HELPER(x)
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/*
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* Silence compiler warnings due to uninitialized values. This is used
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* wherever the compiler fails to recognize that the variable is never used
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* uninitialized.
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*/
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#define JEMALLOC_CC_SILENCE_INIT(v) = v
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#ifdef __GNUC__
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# define likely(x) __builtin_expect(!!(x), 1)
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# define unlikely(x) __builtin_expect(!!(x), 0)
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#else
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# define likely(x) !!(x)
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# define unlikely(x) !!(x)
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#endif
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#if !defined(JEMALLOC_INTERNAL_UNREACHABLE)
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# error JEMALLOC_INTERNAL_UNREACHABLE should have been defined by configure
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#endif
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#define unreachable() JEMALLOC_INTERNAL_UNREACHABLE()
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/* Set error code. */
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UTIL_INLINE void
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set_errno(int errnum) {
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#ifdef _WIN32
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SetLastError(errnum);
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#else
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errno = errnum;
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#endif
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}
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/* Get last error code. */
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UTIL_INLINE int
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get_errno(void) {
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#ifdef _WIN32
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return GetLastError();
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#else
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return errno;
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#endif
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}
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JEMALLOC_ALWAYS_INLINE void
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util_assume(bool b) {
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if (!b) {
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unreachable();
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}
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}
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#undef UTIL_INLINE
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#endif /* JEMALLOC_INTERNAL_UTIL_H */
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