X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=elogind.git;a=blobdiff_plain;f=src%2Fshared%2Fmacro.h;h=dfbc20142f753172ee8708f5e5aa94eca27fa66b;hp=f91f7de76956da0de546cf4bdba1b9c7c66650ca;hb=9f5650aecb22a1d864b2c0b749910556795f1490;hpb=fc6e6d245ee3989c222a2a8cc82a33475f9922f3 diff --git a/src/shared/macro.h b/src/shared/macro.h index f91f7de76..dfbc20142 100644 --- a/src/shared/macro.h +++ b/src/shared/macro.h @@ -27,9 +27,9 @@ #include #include -#define _printf_attr_(a,b) __attribute__ ((format (printf, a, b))) +#define _printf_(a,b) __attribute__ ((format (printf, a, b))) +#define _alloc_(...) __attribute__ ((alloc_size(__VA_ARGS__))) #define _sentinel_ __attribute__ ((sentinel)) -#define _noreturn_ __attribute__((noreturn)) #define _unused_ __attribute__ ((unused)) #define _destructor_ __attribute__ ((destructor)) #define _pure_ __attribute__ ((pure)) @@ -43,7 +43,6 @@ #define _public_ __attribute__ ((visibility("default"))) #define _hidden_ __attribute__ ((visibility("hidden"))) #define _weakref_(x) __attribute__((weakref(#x))) -#define _introspect_(x) __attribute__((section("introspect." x))) #define _alignas_(x) __attribute__((aligned(__alignof(x)))) #define _cleanup_(x) __attribute__((cleanup(x))) @@ -53,6 +52,11 @@ #define XSTRINGIFY(x) #x #define STRINGIFY(x) XSTRINGIFY(x) +#define XCONCATENATE(x, y) x ## y +#define CONCATENATE(x, y) XCONCATENATE(x, y) + +#define UNIQUE(prefix) CONCATENATE(prefix, __LINE__) + /* Rounds up */ #define ALIGN4(l) (((l) + 3) & ~3) @@ -113,6 +117,13 @@ static inline size_t ALIGN_TO(size_t l, size_t ali) { _a < _b ? _a : _b; \ }) +#define LESS_BY(A,B) \ + __extension__ ({ \ + typeof(A) _A = (A); \ + typeof(B) _B = (B); \ + _A > _B ? _A - _B : 0; \ + }) + #ifndef CLAMP #define CLAMP(x, low, high) \ __extension__ ({ \ @@ -143,38 +154,38 @@ static inline size_t ALIGN_TO(size_t l, size_t ali) { } while (false) #if defined(static_assert) -#define assert_cc(expr) \ - do { \ - static_assert(expr, #expr); \ - } while (false) +#define assert_cc(expr) static_assert(expr, #expr) #else -#define assert_cc(expr) \ - do { \ - switch (0) { \ - case 0: \ - case !!(expr): \ - ; \ - } \ - } while (false) +#define assert_cc(expr) struct UNIQUE(_assert_struct_) { char x[(expr) ? 0 : -1]; }; #endif -#define PTR_TO_UINT(p) ((unsigned int) ((uintptr_t) (p))) -#define UINT_TO_PTR(u) ((void*) ((uintptr_t) (u))) +#define assert_return(expr, r) \ + do { \ + if (_unlikely_(!(expr))) { \ + log_assert_failed_return(#expr, __FILE__, __LINE__, __PRETTY_FUNCTION__); \ + return (r); \ + } \ + } while (false) -#define PTR_TO_UINT32(p) ((uint32_t) ((uintptr_t) (p))) -#define UINT32_TO_PTR(u) ((void*) ((uintptr_t) (u))) +#define PTR_TO_INT(p) ((int) ((intptr_t) (p))) +#define INT_TO_PTR(u) ((void *) ((intptr_t) (u))) +#define PTR_TO_UINT(p) ((unsigned int) ((uintptr_t) (p))) +#define UINT_TO_PTR(u) ((void *) ((uintptr_t) (u))) +#define PTR_TO_LONG(p) ((long) ((intptr_t) (p))) +#define LONG_TO_PTR(u) ((void *) ((intptr_t) (u))) #define PTR_TO_ULONG(p) ((unsigned long) ((uintptr_t) (p))) -#define ULONG_TO_PTR(u) ((void*) ((uintptr_t) (u))) +#define ULONG_TO_PTR(u) ((void *) ((uintptr_t) (u))) -#define PTR_TO_INT(p) ((int) ((intptr_t) (p))) -#define INT_TO_PTR(u) ((void*) ((intptr_t) (u))) - -#define TO_INT32(p) ((int32_t) ((intptr_t) (p))) -#define INT32_TO_PTR(u) ((void*) ((intptr_t) (u))) +#define PTR_TO_INT32(p) ((int32_t) ((intptr_t) (p))) +#define INT32_TO_PTR(u) ((void *) ((intptr_t) (u))) +#define PTR_TO_UINT32(p) ((uint32_t) ((uintptr_t) (p))) +#define UINT32_TO_PTR(u) ((void *) ((uintptr_t) (u))) -#define PTR_TO_LONG(p) ((long) ((intptr_t) (p))) -#define LONG_TO_PTR(u) ((void*) ((intptr_t) (u))) +#define PTR_TO_INT64(p) ((int64_t) ((intptr_t) (p))) +#define INT64_TO_PTR(u) ((void *) ((intptr_t) (u))) +#define PTR_TO_UINT64(p) ((uint64_t) ((uintptr_t) (p))) +#define UINT64_TO_PTR(u) ((void *) ((uintptr_t) (u))) #define memzero(x,l) (memset((x), 0, (l))) #define zero(x) (memzero(&(x), sizeof(x))) @@ -264,31 +275,59 @@ do { \ } \ } while(false) -/* Remove this macro, when the kernel has f_type as unsigned int or long - * for every architecure. Currently some 64bit architecures (like s390x) - * have int in the kernel, but long in userspace for f_type, so glibc - * extends the int to long and carries over the sign. Negative numbers are - * caused by the 32bit magic constants in linux/magic.h stuffed into the - * signed int in the kernel and these negative numbers are extended to - * long, which cannot be simply compared to the magic constants anymore. + /* Because statfs.t_type can be int on some architectures, we have to cast + * the const magic to the type, otherwise the compiler warns about + * signed/unsigned comparison, because the magic can be 32 bit unsigned. */ -#define CMP_F_TYPE(f, c) \ - __extension__ ({ \ - __SWORD_TYPE _f = (f); \ - const __SWORD_TYPE _c = (c); \ - const int _c32 = (c); \ - (_f == _c || _f == _c32 ); \ - }) - +#define F_TYPE_EQUAL(a, b) (a == (typeof(a)) b) /* Returns the number of chars needed to format variables of the * specified type as a decimal string. Adds in extra space for a * negative '-' prefix. */ - #define DECIMAL_STR_MAX(type) \ - (1+(sizeof(type) <= 1 ? 3 : \ + (2+(sizeof(type) <= 1 ? 3 : \ sizeof(type) <= 2 ? 5 : \ sizeof(type) <= 4 ? 10 : \ sizeof(type) <= 8 ? 20 : sizeof(int[-2*(sizeof(type) > 8)]))) +#define SET_FLAG(v, flag, b) \ + (v) = (b) ? ((v) | (flag)) : ((v) & ~(flag)) + +#define IN_SET(x, ...) \ + ({ \ + const typeof(x) _x = (x); \ + unsigned _i; \ + bool _found = false; \ + for (_i = 0; _i < sizeof((const typeof(_x)[]) { __VA_ARGS__ })/sizeof(const typeof(_x)); _i++) \ + if (((const typeof(_x)[]) { __VA_ARGS__ })[_i] == _x) { \ + _found = true; \ + break; \ + } \ + _found; \ + }) + +/* Define C11 thread_local attribute even on older gcc compiler + * version */ +#ifndef thread_local +/* + * Don't break on glibc < 2.16 that doesn't define __STDC_NO_THREADS__ + * see http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53769 + */ +#if __STDC_VERSION__ >= 201112L && !(defined(__STDC_NO_THREADS__) || (defined(__GNU_LIBRARY__) && __GLIBC__ == 2 && __GLIBC_MINOR__ < 16)) +#define thread_local _Thread_local +#else +#define thread_local __thread +#endif +#endif + +/* Define C11 noreturn without and even on older gcc + * compiler versions */ +#ifndef noreturn +#if __STDC_VERSION__ >= 201112L +#define noreturn _Noreturn +#else +#define noreturn __attribute__((noreturn)) +#endif +#endif + #include "log.h"