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Enhance loader to allow library version selection for executables, as ldcptest which do not use the config module.

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This commit is contained in:
frtabu
2021-10-27 14:42:12 +02:00
parent 41ba9a5afb
commit a6dd62a50f
9 changed files with 34 additions and 25 deletions
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common/utils/DOC/loader/devusage/api.md
+4
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@@ -10,6 +10,10 @@ int load_module_shlib(char *modname,loader_shlibfunc_t *farray, int numf)
* 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].fptr`function pointers
```c
int load_module_version_shlib(char *modname, char *version, loader_shlibfunc_t *farray, int numf)
```
Allows loading a specific library version, as specified by the `version` parameter. When version is not NULL the version that is possibly specified as a config module parameter is ignored. This call has been introduced for phy simulators executables which do not use the config module. It is used, for example, by the ldcp initialization (`load_nrLDPClib` function in [nrLDPC_load.c](../../../../../openair1/PHY/CODING/nrLDPC_load.c) to allow the `ldpctest` simulator to select the cuda accelerated ldcp implementation. `load_module_shlib` is just a define macro to switch to a `load_module_version_shlib` call, adding a NULL pointer for the version parameter.
```c
void * get_shlibmodule_fptr(char *modname, char *fname)
common/utils/load_module_shlib.c
+7 -4
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@@ -63,7 +63,7 @@ void loader_init(void) {
}
/* build the full shared lib name from the module name */
char *loader_format_shlibpath(char *modname)
char *loader_format_shlibpath(char *modname, char *version)
{
char *tmpstr;
@@ -97,7 +97,10 @@ int ret;
shlibpath = loader_data.shlibpath ;
}
/* no specific shared lib version */
if (shlibversion == NULL) {
if (version != NULL) { // version specified as a function parameter
shlibversion=version;
}
if (shlibversion == NULL) { // no specific version specified, neither as a config param or as a function param
shlibversion = "" ;
}
/* alloc memory for full module shared lib file name */
@@ -118,7 +121,7 @@ int ret;
return tmpstr;
}
int load_module_shlib(char *modname,loader_shlibfunc_t *farray, int numf, void *autoinit_arg)
int load_module_version_shlib(char *modname, char *version, loader_shlibfunc_t *farray, int numf, void *autoinit_arg)
{
void *lib_handle = NULL;
initfunc_t fpi;
@@ -138,7 +141,7 @@ int load_module_shlib(char *modname,loader_shlibfunc_t *farray, int numf, void *
loader_init();
}
shlib_path = loader_format_shlibpath(modname);
shlib_path = loader_format_shlibpath(modname, version);
for (int i = 0; i < loader_data.numshlibs; i++) {
if (strcmp(loader_data.shlibs[i].name, modname) == 0) {
common/utils/load_module_shlib.h
+3 -2
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@@ -84,10 +84,11 @@ loader_data_t loader_data;
/*-------------------------------------------------------------------------------------------------------------*/
#else /* LOAD_MODULE_SHLIB_MAIN */
extern int load_module_shlib(char *modname, loader_shlibfunc_t *farray, int numf, void *initfunc_arg);
extern int load_module_version_shlib(char *modname, char *version, loader_shlibfunc_t *farray, int numf, void *initfunc_arg);
extern void * get_shlibmodule_fptr(char *modname, char *fname);
extern loader_data_t loader_data;
#endif /* LOAD_MODULE_SHLIB_MAIN */
#define load_module_shlib(M, F, N, I) load_module_version_shlib(M, NULL, F, N, I)
#endif