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https://github.com/janet-lang/janet
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Add ffi/pointer-cfunction
to FFI.
This allows for more flexible C interop from DLLs. Users can skip the usual extension loading mechanism and manage function pointers manually if they need to.
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@ -1530,6 +1530,22 @@ JANET_CORE_FN(cfun_ffi_pointer_buffer,
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return janet_wrap_buffer(janet_pointer_buffer_unsafe(offset_pointer, capacity, count));
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}
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JANET_CORE_FN(cfun_ffi_pointer_cfunction,
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"(ffi/pointer-cfunction pointer &opt name source-file source-line)",
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"Create a C Function from a raw pointer. Optionally give the cfunction a name and "
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"source location for stack traces and debugging.") {
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janet_sandbox_assert(JANET_SANDBOX_FFI_USE);
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janet_arity(argc, 1, 4);
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void *pointer = janet_getpointer(argv, 0);
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const char *name = janet_optcstring(argv, argc, 1, NULL);
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const char *source = janet_optcstring(argv, argc, 2, NULL);
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int32_t line = janet_optinteger(argv, argc, 3, -1);
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if ((name != NULL) || (source != NULL) || (line != -1)) {
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janet_registry_put((JanetCFunction) pointer, name, NULL, source, line);
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}
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return janet_wrap_cfunction((JanetCFunction) pointer);
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}
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JANET_CORE_FN(cfun_ffi_supported_calling_conventions,
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"(ffi/calling-conventions)",
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"Get an array of all supported calling conventions on the current arhcitecture. Some architectures may have some FFI "
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@ -1567,6 +1583,7 @@ void janet_lib_ffi(JanetTable *env) {
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JANET_CORE_REG("ffi/malloc", cfun_ffi_malloc),
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JANET_CORE_REG("ffi/free", cfun_ffi_free),
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JANET_CORE_REG("ffi/pointer-buffer", cfun_ffi_pointer_buffer),
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JANET_CORE_REG("ffi/pointer-cfunction", cfun_ffi_pointer_cfunction),
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JANET_CORE_REG("ffi/calling-conventions", cfun_ffi_supported_calling_conventions),
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JANET_REG_END
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};
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