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#include <dlfcn.h>
typedef struct {
void *handle;
} Library;
static FnPtr foreign_get_fn_ptr(ForeignFnManager *ffmgr, FnExpr *fn, Location call_where) {
FnPtr fn_ptr = fn->foreign.fn_ptr;
if (!fn_ptr) {
assert(fn->flags & FN_EXPR_FOREIGN);
const char *libname = fn->foreign.lib;
if (!libname) {
err_print(call_where, "Attempt to call function at compile time which does not have an associated library.");
info_print(fn->where, "Function was declared here.");
return NULL;
}
Library *lib = str_hash_table_get(&ffmgr->libs_loaded, libname, strlen(libname));
if (!lib) {
void *handle = dlopen(libname, RTLD_LAZY);
if (!handle) {
err_print(call_where, "Could not open dynamic library: %s.", libname);
return NULL;
}
lib = str_hash_table_insert(&ffmgr->libs_loaded, libname, strlen(libname));
lib->handle = handle;
}
const char *name = fn->foreign.name;
#ifdef __GNUC__
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wpedantic"
#endif
fn_ptr = dlsym(lib->handle, name);
#ifdef __GNUC__
#pragma GCC diagnostic pop
#endif
if (!fn_ptr) {
err_print(call_where, "Could not get function from dynamic library: %s.", name);
return NULL;
}
fn->foreign.fn_ptr = fn_ptr;
}
return fn_ptr;
}
#ifdef FOREIGN_USE_AVCALL
#include "foreign_avcall.c"
#elif defined __x86_64__
#include "foreign64.c"
#else
#include "foreign_avcall.c"
#endif
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