[Mammoth] Move ipc calls to separate folder mammoth.

lib/mammoth/ipc/endpoint_server.cpp

@@ -0,0 +1,42 @@
+#include "ipc/endpoint_server.h"
+
+#include "mammoth/debug.h"
+
+// Declared as friend in EndpointServer.
+void EndpointServerThreadBootstrap(void* endpoint_server) {
+  reinterpret_cast<EndpointServer*>(endpoint_server)->ServerThread();
+}
+
+glcr::ErrorOr<glcr::UniquePtr<EndpointClient>> EndpointServer::CreateClient() {
+  uint64_t client_cap;
+  RET_ERR(ZCapDuplicate(endpoint_cap_, ~(kZionPerm_Read), &client_cap));
+  return EndpointClient::AdoptEndpoint(client_cap);
+}
+
+Thread EndpointServer::RunServer() {
+  return Thread(EndpointServerThreadBootstrap, this);
+}
+
+void EndpointServer::ServerThread() {
+  while (true) {
+    uint64_t message_size = kBufferSize;
+    uint64_t reply_port_cap = 0;
+    uint64_t num_caps = 0;
+    glcr::ErrorCode err = static_cast<glcr::ErrorCode>(
+        ZEndpointRecv(endpoint_cap_, &message_size, recieve_buffer_, &num_caps,
+                      nullptr, &reply_port_cap));
+    if (err != glcr::OK) {
+      dbgln("Error in receive: {x}", err);
+      continue;
+    }
+
+    RequestContext request(recieve_buffer_, message_size);
+    ResponseContext response(reply_port_cap);
+    // FIXME: Consider pumping these errors into the response as well.
+    check(HandleRequest(request, response));
+    if (!response.HasWritten()) {
+      dbgln("Returning without having written a response. Req type {x}",
+            request.request_id());
+    }
+  }
+}