55 lines
1.3 KiB
C
55 lines
1.3 KiB
C
/**************************************************************
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_ __ _ _
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_ __ ___| |_ _ __ ___ / _| ___ _ __| |_| |__
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| '__/ _ \ __| '__/ _ \| |_ / _ \| '__| __| '_ \
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| | | __/ |_| | | (_) | _| (_) | | | |_| | | |
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|_| \___|\__|_| \___/|_| \___/|_| \__|_| |_|
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for nga
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(c) Charles Childers, Luke Parrish, Marc Simpsonn,
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Jay Skeer, Kenneth Keating
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**************************************************************/
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#ifdef ENABLE_FFI
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#include <dlfcn.h>
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typedef void (*External)(void *);
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V *handles[32];
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External funcs[32000];
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int nlibs, nffi;
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V open_library(NgaState *vm) {
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handles[nlibs] = dlopen(string_extract(vm, stack_pop(vm)), RTLD_LAZY);
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stack_push(vm, nlibs);
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nlibs++;
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}
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V map_symbol(NgaState *vm) {
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int h;
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h = stack_pop(vm);
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char *s = string_extract(vm, stack_pop(vm));
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funcs[nffi] = dlsym(handles[h], s);
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stack_push(vm, nffi);
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nffi++;
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}
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V invoke(NgaState *vm) {
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funcs[stack_pop(vm)](vm);
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}
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V io_ffi(NgaState *vm) {
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switch (stack_pop(vm)) {
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case 0: open_library(vm); break;
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case 1: map_symbol(vm); break;
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case 2: invoke(vm); break;
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}
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}
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V query_ffi(NgaState *vm) {
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stack_push(vm, 0);
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stack_push(vm, DEVICE_FFI);
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}
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#endif
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