| /* |
| * |
| * Copyright 2018 gRPC authors. |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| * |
| */ |
| |
| #include <grpc/support/port_platform.h> |
| |
| #include "src/core/lib/iomgr/port.h" |
| |
| #include <stddef.h> |
| #include <string.h> |
| |
| #include <grpc/support/alloc.h> |
| #include <grpc/support/log.h> |
| #include <grpc/support/sync.h> |
| |
| #include "src/core/lib/iomgr/closure.h" |
| #include "src/core/lib/iomgr/iomgr_custom.h" |
| #include "src/core/lib/iomgr/pollset.h" |
| #include "src/core/lib/iomgr/pollset_custom.h" |
| #include "src/core/lib/iomgr/timer.h" |
| |
| #include "src/core/lib/debug/trace.h" |
| |
| static grpc_custom_poller_vtable* poller_vtable; |
| |
| struct grpc_pollset { |
| gpr_mu mu; |
| }; |
| |
| static size_t pollset_size() { return sizeof(grpc_pollset); } |
| |
| static void pollset_global_init() { poller_vtable->init(); } |
| |
| static void pollset_global_shutdown() { poller_vtable->shutdown(); } |
| |
| static void pollset_init(grpc_pollset* pollset, gpr_mu** mu) { |
| GRPC_CUSTOM_IOMGR_ASSERT_SAME_THREAD(); |
| gpr_mu_init(&pollset->mu); |
| *mu = &pollset->mu; |
| } |
| |
| static void pollset_shutdown(grpc_pollset* pollset, grpc_closure* closure) { |
| GRPC_CUSTOM_IOMGR_ASSERT_SAME_THREAD(); |
| GRPC_CLOSURE_SCHED(closure, GRPC_ERROR_NONE); |
| } |
| |
| static void pollset_destroy(grpc_pollset* pollset) { |
| GRPC_CUSTOM_IOMGR_ASSERT_SAME_THREAD(); |
| gpr_mu_destroy(&pollset->mu); |
| } |
| |
| static grpc_error* pollset_work(grpc_pollset* pollset, |
| grpc_pollset_worker** worker_hdl, |
| grpc_millis deadline) { |
| GRPC_CUSTOM_IOMGR_ASSERT_SAME_THREAD(); |
| gpr_mu_unlock(&pollset->mu); |
| grpc_millis now = grpc_core::ExecCtx::Get()->Now(); |
| grpc_millis timeout = 0; |
| if (deadline > now) { |
| timeout = deadline - now; |
| } |
| // We yield here because the poll() call might yield |
| // control back to the application |
| grpc_core::ExecCtx* curr = grpc_core::ExecCtx::Get(); |
| grpc_core::ExecCtx::Set(nullptr); |
| poller_vtable->poll(static_cast<size_t>(timeout)); |
| grpc_core::ExecCtx::Set(curr); |
| grpc_core::ExecCtx::Get()->InvalidateNow(); |
| if (grpc_core::ExecCtx::Get()->HasWork()) { |
| grpc_core::ExecCtx::Get()->Flush(); |
| } |
| gpr_mu_lock(&pollset->mu); |
| return GRPC_ERROR_NONE; |
| } |
| |
| static grpc_error* pollset_kick(grpc_pollset* pollset, |
| grpc_pollset_worker* specific_worker) { |
| GRPC_CUSTOM_IOMGR_ASSERT_SAME_THREAD(); |
| poller_vtable->kick(); |
| return GRPC_ERROR_NONE; |
| } |
| |
| grpc_pollset_vtable custom_pollset_vtable = { |
| pollset_global_init, pollset_global_shutdown, |
| pollset_init, pollset_shutdown, |
| pollset_destroy, pollset_work, |
| pollset_kick, pollset_size}; |
| |
| void grpc_custom_pollset_init(grpc_custom_poller_vtable* vtable) { |
| poller_vtable = vtable; |
| grpc_set_pollset_vtable(&custom_pollset_vtable); |
| } |