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dlfcn-util: add two new macros for making it easier to create "sym_xyz" indirect function call variables

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Let's use "typeof" to make it easier to generate "sym_xyz" wrappers of
functions exposed by libraries.
This commit is contained in:
Lennart Poettering 2023-11-02 15:53:40 +01:00
parent 69d17e23db
commit 9519b94796
1 changed files with 5 additions and 0 deletions
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5
src/shared/dlfcn-util.h
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@ -15,6 +15,11 @@ int dlopen_many_sym_or_warn_sentinel(void **dlp, const char *filename, int log_l
#define dlopen_many_sym_or_warn(dlp, filename, log_level, ...) \
dlopen_many_sym_or_warn_sentinel(dlp, filename, log_level, __VA_ARGS__, NULL)
#define DLSYM_PROTOTYPE(symbol) \
extern typeof(symbol)* sym_##symbol
#define DLSYM_FUNCTION(symbol) \
typeof(symbol)* sym_##symbol = NULL
/* Macro useful for putting together variable/symbol name pairs when calling dlsym_many_or_warn(). Assumes
* that each library symbol to resolve will be placed in a variable with the "sym_" prefix, i.e. a symbol
* "foobar" is loaded into a variable "sym_foobar". */