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backend/internal/pluginhost/host_callbacks_unix.go

@@ -0,0 +1,65 @@
+//go:build cgo && (linux || darwin || freebsd)
+
+package pluginhost
+
+/*
+#include <stdint.h>
+#include <stdlib.h>
+
+typedef struct {
+	void* ptr;
+	size_t len;
+} cliproxy_buffer;
+*/
+import "C"
+
+import (
+	"context"
+	"unsafe"
+)
+
+//export cliproxyHostCall
+func cliproxyHostCall(hostCtx unsafe.Pointer, method *C.char, request *C.uint8_t, requestLen C.size_t, response *C.cliproxy_buffer) C.int {
+	if response != nil {
+		response.ptr = nil
+		response.len = 0
+	}
+	if hostCtx == nil || method == nil {
+		return 1
+	}
+	id := uintptr(*(*C.uintptr_t)(hostCtx))
+	rawHost, okHost := hostCallbackEntries.Load(id)
+	if !okHost {
+		return 1
+	}
+	entry, okHost := rawHost.(dynamicHostCallbackEntry)
+	if !okHost || entry.host == nil {
+		return 1
+	}
+	var requestBytes []byte
+	if request != nil && requestLen > 0 {
+		requestBytes = C.GoBytes(unsafe.Pointer(request), C.int(requestLen))
+	}
+	ctx := withHostCallbackPluginID(context.Background(), entry.pluginID)
+	resp, errCall := entry.host.callFromPlugin(ctx, C.GoString(method), requestBytes)
+	if errCall != nil {
+		resp = marshalRPCError("host_call_failed", errCall.Error())
+	}
+	if len(resp) == 0 || response == nil {
+		return 0
+	}
+	ptr := C.CBytes(resp)
+	if ptr == nil {
+		return 1
+	}
+	response.ptr = ptr
+	response.len = C.size_t(len(resp))
+	return 0
+}
+
+//export cliproxyHostFree
+func cliproxyHostFree(ptr unsafe.Pointer, len C.size_t) {
+	if ptr != nil {
+		C.free(ptr)
+	}
+}