| /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ |
| |
| #pragma once |
| |
| /*** |
| This file is part of systemd. |
| |
| Copyright 2010 Lennart Poettering |
| |
| systemd is free software; you can redistribute it and/or modify it |
| under the terms of the GNU Lesser General Public License as published by |
| the Free Software Foundation; either version 2.1 of the License, or |
| (at your option) any later version. |
| |
| systemd is distributed in the hope that it will be useful, but |
| WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| Lesser General Public License for more details. |
| |
| You should have received a copy of the GNU Lesser General Public License |
| along with systemd; If not, see <http://www.gnu.org/licenses/>. |
| ***/ |
| |
| #include <assert.h> |
| #include <sys/param.h> |
| #include <sys/types.h> |
| #include <sys/uio.h> |
| #include <inttypes.h> |
| |
| #define _printf_(a,b) __attribute__ ((format (printf, a, b))) |
| #define _alloc_(...) __attribute__ ((alloc_size(__VA_ARGS__))) |
| #define _sentinel_ __attribute__ ((sentinel)) |
| #define _unused_ __attribute__ ((unused)) |
| #define _destructor_ __attribute__ ((destructor)) |
| #define _pure_ __attribute__ ((pure)) |
| #define _const_ __attribute__ ((const)) |
| #define _deprecated_ __attribute__ ((deprecated)) |
| #define _packed_ __attribute__ ((packed)) |
| #define _malloc_ __attribute__ ((malloc)) |
| #define _weak_ __attribute__ ((weak)) |
| #define _likely_(x) (__builtin_expect(!!(x),1)) |
| #define _unlikely_(x) (__builtin_expect(!!(x),0)) |
| #define _public_ __attribute__ ((visibility("default"))) |
| #define _hidden_ __attribute__ ((visibility("hidden"))) |
| #define _weakref_(x) __attribute__((weakref(#x))) |
| #define _alignas_(x) __attribute__((aligned(__alignof(x)))) |
| #define _cleanup_(x) __attribute__((cleanup(x))) |
| |
| /* Temporarily disable some warnings */ |
| #define DISABLE_WARNING_DECLARATION_AFTER_STATEMENT \ |
| _Pragma("GCC diagnostic push"); \ |
| _Pragma("GCC diagnostic ignored \"-Wdeclaration-after-statement\"") |
| |
| #define DISABLE_WARNING_FORMAT_NONLITERAL \ |
| _Pragma("GCC diagnostic push"); \ |
| _Pragma("GCC diagnostic ignored \"-Wformat-nonliteral\"") |
| |
| #define DISABLE_WARNING_MISSING_PROTOTYPES \ |
| _Pragma("GCC diagnostic push"); \ |
| _Pragma("GCC diagnostic ignored \"-Wmissing-prototypes\"") |
| |
| #define DISABLE_WARNING_NONNULL \ |
| _Pragma("GCC diagnostic push"); \ |
| _Pragma("GCC diagnostic ignored \"-Wnonnull\"") |
| |
| #define DISABLE_WARNING_SHADOW \ |
| _Pragma("GCC diagnostic push"); \ |
| _Pragma("GCC diagnostic ignored \"-Wshadow\"") |
| |
| #define REENABLE_WARNING \ |
| _Pragma("GCC diagnostic pop") |
| |
| /* automake test harness */ |
| #define EXIT_TEST_SKIP 77 |
| |
| #define XSTRINGIFY(x) #x |
| #define STRINGIFY(x) XSTRINGIFY(x) |
| |
| #define XCONCATENATE(x, y) x ## y |
| #define CONCATENATE(x, y) XCONCATENATE(x, y) |
| |
| #define UNIQ_T(x, uniq) CONCATENATE(__unique_prefix_, CONCATENATE(x, uniq)) |
| #define UNIQ __COUNTER__ |
| |
| /* Rounds up */ |
| |
| #define ALIGN4(l) (((l) + 3) & ~3) |
| #define ALIGN8(l) (((l) + 7) & ~7) |
| |
| #if __SIZEOF_POINTER__ == 8 |
| #define ALIGN(l) ALIGN8(l) |
| #elif __SIZEOF_POINTER__ == 4 |
| #define ALIGN(l) ALIGN4(l) |
| #else |
| #error "Wut? Pointers are neither 4 nor 8 bytes long?" |
| #endif |
| |
| #define ALIGN_PTR(p) ((void*) ALIGN((unsigned long) (p))) |
| #define ALIGN4_PTR(p) ((void*) ALIGN4((unsigned long) (p))) |
| #define ALIGN8_PTR(p) ((void*) ALIGN8((unsigned long) (p))) |
| |
| static inline size_t ALIGN_TO(size_t l, size_t ali) { |
| return ((l + ali - 1) & ~(ali - 1)); |
| } |
| |
| #define ALIGN_TO_PTR(p, ali) ((void*) ALIGN_TO((unsigned long) (p), (ali))) |
| |
| /* align to next higher power-of-2 (except for: 0 => 0, overflow => 0) */ |
| static inline unsigned long ALIGN_POWER2(unsigned long u) { |
| /* clz(0) is undefined */ |
| if (u == 1) |
| return 1; |
| |
| /* left-shift overflow is undefined */ |
| if (__builtin_clzl(u - 1UL) < 1) |
| return 0; |
| |
| return 1UL << (sizeof(u) * 8 - __builtin_clzl(u - 1UL)); |
| } |
| |
| #define ELEMENTSOF(x) (sizeof(x)/sizeof((x)[0])) |
| |
| /* |
| * container_of - cast a member of a structure out to the containing structure |
| * @ptr: the pointer to the member. |
| * @type: the type of the container struct this is embedded in. |
| * @member: the name of the member within the struct. |
| */ |
| #define container_of(ptr, type, member) __container_of(UNIQ, (ptr), type, member) |
| #define __container_of(uniq, ptr, type, member) \ |
| __extension__ ({ \ |
| const typeof( ((type*)0)->member ) *UNIQ_T(A, uniq) = (ptr); \ |
| (type*)( (char *)UNIQ_T(A, uniq) - offsetof(type,member) ); \ |
| }) |
| |
| #undef MAX |
| #define MAX(a, b) __MAX(UNIQ, (a), UNIQ, (b)) |
| #define __MAX(aq, a, bq, b) \ |
| __extension__ ({ \ |
| const typeof(a) UNIQ_T(A, aq) = (a); \ |
| const typeof(b) UNIQ_T(B, bq) = (b); \ |
| UNIQ_T(A,aq) > UNIQ_T(B,bq) ? UNIQ_T(A,aq) : UNIQ_T(B,bq); \ |
| }) |
| |
| /* evaluates to (void) if _A or _B are not constant or of different types */ |
| #define CONST_MAX(_A, _B) \ |
| __extension__ (__builtin_choose_expr( \ |
| __builtin_constant_p(_A) && \ |
| __builtin_constant_p(_B) && \ |
| __builtin_types_compatible_p(typeof(_A), typeof(_B)), \ |
| ((_A) > (_B)) ? (_A) : (_B), \ |
| (void)0)) |
| |
| /* takes two types and returns the size of the larger one */ |
| #define MAXSIZE(A, B) (sizeof(union _packed_ { typeof(A) a; typeof(B) b; })) |
| |
| #define MAX3(x,y,z) \ |
| __extension__ ({ \ |
| const typeof(x) _c = MAX(x,y); \ |
| MAX(_c, z); \ |
| }) |
| |
| #undef MIN |
| #define MIN(a, b) __MIN(UNIQ, (a), UNIQ, (b)) |
| #define __MIN(aq, a, bq, b) \ |
| __extension__ ({ \ |
| const typeof(a) UNIQ_T(A, aq) = (a); \ |
| const typeof(b) UNIQ_T(B, bq) = (b); \ |
| UNIQ_T(A,aq) < UNIQ_T(B,bq) ? UNIQ_T(A,aq) : UNIQ_T(B,bq); \ |
| }) |
| |
| #define MIN3(x,y,z) \ |
| __extension__ ({ \ |
| const typeof(x) _c = MIN(x,y); \ |
| MIN(_c, z); \ |
| }) |
| |
| #define LESS_BY(a, b) __LESS_BY(UNIQ, (a), UNIQ, (b)) |
| #define __LESS_BY(aq, a, bq, b) \ |
| __extension__ ({ \ |
| const typeof(a) UNIQ_T(A, aq) = (a); \ |
| const typeof(b) UNIQ_T(B, bq) = (b); \ |
| UNIQ_T(A,aq) > UNIQ_T(B,bq) ? UNIQ_T(A,aq) - UNIQ_T(B,bq) : 0; \ |
| }) |
| |
| #undef CLAMP |
| #define CLAMP(x, low, high) __CLAMP(UNIQ, (x), UNIQ, (low), UNIQ, (high)) |
| #define __CLAMP(xq, x, lowq, low, highq, high) \ |
| __extension__ ({ \ |
| const typeof(x) UNIQ_T(X,xq) = (x); \ |
| const typeof(low) UNIQ_T(LOW,lowq) = (low); \ |
| const typeof(high) UNIQ_T(HIGH,highq) = (high); \ |
| UNIQ_T(X,xq) > UNIQ_T(HIGH,highq) ? \ |
| UNIQ_T(HIGH,highq) : \ |
| UNIQ_T(X,xq) < UNIQ_T(LOW,lowq) ? \ |
| UNIQ_T(LOW,lowq) : \ |
| UNIQ_T(X,xq); \ |
| }) |
| |
| #define assert_se(expr) \ |
| do { \ |
| if (_unlikely_(!(expr))) \ |
| log_assert_failed(#expr, __FILE__, __LINE__, __PRETTY_FUNCTION__); \ |
| } while (false) \ |
| |
| /* We override the glibc assert() here. */ |
| #undef assert |
| #ifdef NDEBUG |
| #define assert(expr) do {} while(false) |
| #else |
| #define assert(expr) assert_se(expr) |
| #endif |
| |
| #define assert_not_reached(t) \ |
| do { \ |
| log_assert_failed_unreachable(t, __FILE__, __LINE__, __PRETTY_FUNCTION__); \ |
| } while (false) |
| |
| #if defined(static_assert) |
| /* static_assert() is sometimes defined in a way that trips up |
| * -Wdeclaration-after-statement, hence let's temporarily turn off |
| * this warning around it. */ |
| #define assert_cc(expr) \ |
| DISABLE_WARNING_DECLARATION_AFTER_STATEMENT; \ |
| static_assert(expr, #expr); \ |
| REENABLE_WARNING |
| #else |
| #define assert_cc(expr) \ |
| DISABLE_WARNING_DECLARATION_AFTER_STATEMENT; \ |
| struct CONCATENATE(_assert_struct_, __LINE__) { \ |
| char x[(expr) ? 0 : -1]; \ |
| }; \ |
| REENABLE_WARNING |
| #endif |
| |
| #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_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 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_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 PTR_TO_SIZE(p) ((size_t) ((uintptr_t) (p))) |
| #define SIZE_TO_PTR(u) ((void *) ((uintptr_t) (u))) |
| |
| #define memzero(x,l) (memset((x), 0, (l))) |
| #define zero(x) (memzero(&(x), sizeof(x))) |
| |
| #define CHAR_TO_STR(x) ((char[2]) { x, 0 }) |
| |
| #define char_array_0(x) x[sizeof(x)-1] = 0; |
| |
| #define IOVEC_SET_STRING(i, s) \ |
| do { \ |
| struct iovec *_i = &(i); \ |
| char *_s = (char *)(s); \ |
| _i->iov_base = _s; \ |
| _i->iov_len = strlen(_s); \ |
| } while(false) |
| |
| static inline size_t IOVEC_TOTAL_SIZE(const struct iovec *i, unsigned n) { |
| unsigned j; |
| size_t r = 0; |
| |
| for (j = 0; j < n; j++) |
| r += i[j].iov_len; |
| |
| return r; |
| } |
| |
| static inline size_t IOVEC_INCREMENT(struct iovec *i, unsigned n, size_t k) { |
| unsigned j; |
| |
| for (j = 0; j < n; j++) { |
| size_t sub; |
| |
| if (_unlikely_(k <= 0)) |
| break; |
| |
| sub = MIN(i[j].iov_len, k); |
| i[j].iov_len -= sub; |
| i[j].iov_base = (uint8_t*) i[j].iov_base + sub; |
| k -= sub; |
| } |
| |
| return k; |
| } |
| |
| #define VA_FORMAT_ADVANCE(format, ap) \ |
| do { \ |
| int _argtypes[128]; \ |
| size_t _i, _k; \ |
| _k = parse_printf_format((format), ELEMENTSOF(_argtypes), _argtypes); \ |
| assert(_k < ELEMENTSOF(_argtypes)); \ |
| for (_i = 0; _i < _k; _i++) { \ |
| if (_argtypes[_i] & PA_FLAG_PTR) { \ |
| (void) va_arg(ap, void*); \ |
| continue; \ |
| } \ |
| \ |
| switch (_argtypes[_i]) { \ |
| case PA_INT: \ |
| case PA_INT|PA_FLAG_SHORT: \ |
| case PA_CHAR: \ |
| (void) va_arg(ap, int); \ |
| break; \ |
| case PA_INT|PA_FLAG_LONG: \ |
| (void) va_arg(ap, long int); \ |
| break; \ |
| case PA_INT|PA_FLAG_LONG_LONG: \ |
| (void) va_arg(ap, long long int); \ |
| break; \ |
| case PA_WCHAR: \ |
| (void) va_arg(ap, wchar_t); \ |
| break; \ |
| case PA_WSTRING: \ |
| case PA_STRING: \ |
| case PA_POINTER: \ |
| (void) va_arg(ap, void*); \ |
| break; \ |
| case PA_FLOAT: \ |
| case PA_DOUBLE: \ |
| (void) va_arg(ap, double); \ |
| break; \ |
| case PA_DOUBLE|PA_FLAG_LONG_DOUBLE: \ |
| (void) va_arg(ap, long double); \ |
| break; \ |
| default: \ |
| assert_not_reached("Unknown format string argument."); \ |
| } \ |
| } \ |
| } while(false) |
| |
| /* 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 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) \ |
| (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, y, ...) \ |
| ({ \ |
| const typeof(y) _y = (y); \ |
| const typeof(_y) _x = (x); \ |
| unsigned _i; \ |
| bool _found = false; \ |
| for (_i = 0; _i < 1 + sizeof((const typeof(_x)[]) { __VA_ARGS__ })/sizeof(const typeof(_x)); _i++) \ |
| if (((const typeof(_x)[]) { _y, __VA_ARGS__ })[_i] == _x) { \ |
| _found = true; \ |
| break; \ |
| } \ |
| _found; \ |
| }) |
| |
| /* Return a nulstr for a standard cascade of configuration directories, |
| * suitable to pass to conf_files_list_nulstr or config_parse_many. */ |
| #define CONF_DIRS_NULSTR(n) \ |
| "/etc/" n ".d\0" \ |
| "/run/" n ".d\0" \ |
| "/usr/local/lib/" n ".d\0" \ |
| "/usr/lib/" n ".d\0" \ |
| CONF_DIR_SPLIT_USR(n) |
| |
| #ifdef HAVE_SPLIT_USR |
| #define CONF_DIR_SPLIT_USR(n) "/lib/" n ".d\0" |
| #else |
| #define CONF_DIR_SPLIT_USR(n) |
| #endif |
| |
| /* 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 <stdnoreturn.h> and even on older gcc |
| * compiler versions */ |
| #ifndef noreturn |
| #if __STDC_VERSION__ >= 201112L |
| #define noreturn _Noreturn |
| #else |
| #define noreturn __attribute__((noreturn)) |
| #endif |
| #endif |
| |
| #define UID_INVALID ((uid_t) -1) |
| #define GID_INVALID ((gid_t) -1) |
| #define MODE_INVALID ((mode_t) -1) |
| |
| #include "log.h" |