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75 lines
1.9 KiB
C
75 lines
1.9 KiB
C
/* SPDX-License-Identifier: LGPL-2.1-or-later */
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#pragma once
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#include <stdint.h>
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#include "macro.h"
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extern int saved_argc;
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extern char **saved_argv;
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static inline void save_argc_argv(int argc, char **argv) {
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saved_argc = argc;
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saved_argv = argv;
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}
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bool kexec_loaded(void);
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int prot_from_flags(int flags) _const_;
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bool in_initrd(void);
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void in_initrd_force(bool value);
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/* Note: log2(0) == log2(1) == 0 here and below. */
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#define CONST_LOG2ULL(x) ((x) > 1 ? (unsigned) __builtin_clzll(x) ^ 63U : 0)
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#define NONCONST_LOG2ULL(x) ({ \
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unsigned long long _x = (x); \
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_x > 1 ? (unsigned) __builtin_clzll(_x) ^ 63U : 0; \
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})
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#define LOG2ULL(x) __builtin_choose_expr(__builtin_constant_p(x), CONST_LOG2ULL(x), NONCONST_LOG2ULL(x))
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static inline unsigned log2u64(uint64_t x) {
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#if __SIZEOF_LONG_LONG__ == 8
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return LOG2ULL(x);
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#else
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# error "Wut?"
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#endif
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}
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static inline unsigned u32ctz(uint32_t n) {
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#if __SIZEOF_INT__ == 4
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return n != 0 ? __builtin_ctz(n) : 32;
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#else
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# error "Wut?"
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#endif
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}
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#define CONST_LOG2U(x) ((x) > 1 ? __SIZEOF_INT__ * 8 - __builtin_clz(x) - 1 : 0)
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#define NONCONST_LOG2U(x) ({ \
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unsigned _x = (x); \
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_x > 1 ? __SIZEOF_INT__ * 8 - __builtin_clz(_x) - 1 : 0; \
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})
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#define LOG2U(x) __builtin_choose_expr(__builtin_constant_p(x), CONST_LOG2U(x), NONCONST_LOG2U(x))
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static inline unsigned log2i(int x) {
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return LOG2U(x);
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}
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static inline unsigned log2u(unsigned x) {
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return LOG2U(x);
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}
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static inline unsigned log2u_round_up(unsigned x) {
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if (x <= 1)
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return 0;
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return log2u(x - 1) + 1;
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}
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int container_get_leader(const char *machine, pid_t *pid);
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int version(void);
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void disable_coredumps(void);
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