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1c20c9f4fc
I'm going to dlopen_many_sym_or_warn() in src/basic/compress.c, this will introduce a circular dependency because libshared already depends from libbasic. To avoid this, move dlfcn-util.c from libshared to libbasic.
42 lines
1.5 KiB
C
42 lines
1.5 KiB
C
/* SPDX-License-Identifier: LGPL-2.1-or-later */
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#pragma once
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#include <dlfcn.h>
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#include "macro.h"
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static inline void* safe_dlclose(void *dl) {
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if (!dl)
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return NULL;
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assert_se(dlclose(dl) == 0);
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return NULL;
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}
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static inline void dlclosep(void **dlp) {
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safe_dlclose(*dlp);
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}
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int dlsym_many_or_warn_sentinel(void *dl, int log_level, ...) _sentinel_;
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int dlopen_many_sym_or_warn_sentinel(void **dlp, const char *filename, int log_level, ...) _sentinel_;
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#define dlsym_many_or_warn(dl, log_level, ...) \
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dlsym_many_or_warn_sentinel(dl, log_level, __VA_ARGS__, NULL)
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#define dlopen_many_sym_or_warn(dlp, filename, log_level, ...) \
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dlopen_many_sym_or_warn_sentinel(dlp, filename, log_level, __VA_ARGS__, NULL)
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#define DLSYM_PROTOTYPE(symbol) \
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extern typeof(symbol)* sym_##symbol
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#define DLSYM_FUNCTION(symbol) \
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typeof(symbol)* sym_##symbol = NULL
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/* Macro useful for putting together variable/symbol name pairs when calling dlsym_many_or_warn(). Assumes
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* that each library symbol to resolve will be placed in a variable with the "sym_" prefix, i.e. a symbol
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* "foobar" is loaded into a variable "sym_foobar". */
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#define DLSYM_ARG(arg) \
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({ assert_cc(__builtin_types_compatible_p(typeof(sym_##arg), typeof(&arg))); &sym_##arg; }), STRINGIFY(arg)
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/* libbpf is a bit confused about type-safety and API compatibility. Provide a macro that can tape over that mess. Sad. */
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#define DLSYM_ARG_FORCE(arg) \
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&sym_##arg, STRINGIFY(arg)
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