openairinterface5g/common/utils/DOC/loader/devusage/api.md

Loader API is defined in the common/utils/load_module_shlib.h include file.

int load_module_shlib(char *modname,loader_shlibfunc_t *farray, int numf)

• possibly initializes the loader, if it has not been already initialized
• Formats the full shared library path, using the modname argument and the loader shlibpath and shlibversionconfiguration parameters.
• loads the shared library, using the dlopen system call
• looks for < modname >_autoinit symbol, using the dlsym system call and possibly call the corresponding function.
• looks for < modname >_checkbuildver symbol, using the dlsym system call and possibly calls the corresponding function. If the return value of this call is -1, program execution is stopped. It is the responsibility of the shared library developer to implement or not a < modname >_checkbuildver function and to decide if a version mismatch is a fatal condition. The < modname >_checkbuildver function must match the checkverfunc_t function type. The first argument is the main executable version, as set in the PACKAGE_VERSION macro defined in the oai CMakeLists, around line 218. The second argument points to the shared library version which should be set by the < modname >_checkbuildver function.
• If the farray pointer is null, looks for < modname >_getfarray symbol, calls the corresponding function when the symbol is found. < modname >_getfarray takes one argument, a pointer to a loader_shlibfunc_t array, and returns the number of items in this array, as defined by the getfarrayfunc_t type. The loader_shlibfunc_t array returned by the shared library must be fully filled (both fname and fptr fields).
• looks for the numf function symbols listed in the farray[i].fname arguments and set the corresponding farray[i].fptrfunction pointers

void * get_shlibmodule_fptr(char *modname, char *fname)

Returns a pointer to the symbol fname, defined in module modname, or NULL if the symbol is not found.

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