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/*
*
* 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);
}
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