| /* |
| * |
| * Copyright 2015 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/exec_ctx.h" |
| |
| #include <grpc/support/log.h> |
| #include <grpc/support/sync.h> |
| |
| #include "src/core/lib/gprpp/thd.h" |
| #include "src/core/lib/iomgr/combiner.h" |
| #include "src/core/lib/profiling/timers.h" |
| |
| static void exec_ctx_run(grpc_closure* closure, grpc_error* error) { |
| #ifndef NDEBUG |
| closure->scheduled = false; |
| if (grpc_trace_closure.enabled()) { |
| gpr_log(GPR_DEBUG, "running closure %p: created [%s:%d]: %s [%s:%d]", |
| closure, closure->file_created, closure->line_created, |
| closure->run ? "run" : "scheduled", closure->file_initiated, |
| closure->line_initiated); |
| } |
| #endif |
| closure->cb(closure->cb_arg, error); |
| #ifndef NDEBUG |
| if (grpc_trace_closure.enabled()) { |
| gpr_log(GPR_DEBUG, "closure %p finished", closure); |
| } |
| #endif |
| GRPC_ERROR_UNREF(error); |
| } |
| |
| static void exec_ctx_sched(grpc_closure* closure, grpc_error* error) { |
| grpc_closure_list_append(grpc_core::ExecCtx::Get()->closure_list(), closure, |
| error); |
| } |
| |
| static gpr_timespec g_start_time; |
| |
| // For debug of the timer manager crash only. |
| // TODO (mxyan): remove after bug is fixed. |
| #ifdef GRPC_DEBUG_TIMER_MANAGER |
| extern int64_t g_start_time_sec; |
| extern int64_t g_start_time_nsec; |
| #endif // GRPC_DEBUG_TIMER_MANAGER |
| |
| static grpc_millis timespec_to_millis_round_down(gpr_timespec ts) { |
| ts = gpr_time_sub(ts, g_start_time); |
| double x = GPR_MS_PER_SEC * static_cast<double>(ts.tv_sec) + |
| static_cast<double>(ts.tv_nsec) / GPR_NS_PER_MS; |
| if (x < 0) return 0; |
| if (x > GRPC_MILLIS_INF_FUTURE) return GRPC_MILLIS_INF_FUTURE; |
| return static_cast<grpc_millis>(x); |
| } |
| |
| static grpc_millis timespec_to_millis_round_up(gpr_timespec ts) { |
| ts = gpr_time_sub(ts, g_start_time); |
| double x = GPR_MS_PER_SEC * static_cast<double>(ts.tv_sec) + |
| static_cast<double>(ts.tv_nsec) / GPR_NS_PER_MS + |
| static_cast<double>(GPR_NS_PER_SEC - 1) / |
| static_cast<double>(GPR_NS_PER_SEC); |
| if (x < 0) return 0; |
| if (x > GRPC_MILLIS_INF_FUTURE) return GRPC_MILLIS_INF_FUTURE; |
| return static_cast<grpc_millis>(x); |
| } |
| |
| gpr_timespec grpc_millis_to_timespec(grpc_millis millis, |
| gpr_clock_type clock_type) { |
| // special-case infinities as grpc_millis can be 32bit on some platforms |
| // while gpr_time_from_millis always takes an int64_t. |
| if (millis == GRPC_MILLIS_INF_FUTURE) { |
| return gpr_inf_future(clock_type); |
| } |
| if (millis == GRPC_MILLIS_INF_PAST) { |
| return gpr_inf_past(clock_type); |
| } |
| |
| if (clock_type == GPR_TIMESPAN) { |
| return gpr_time_from_millis(millis, GPR_TIMESPAN); |
| } |
| return gpr_time_add(gpr_convert_clock_type(g_start_time, clock_type), |
| gpr_time_from_millis(millis, GPR_TIMESPAN)); |
| } |
| |
| grpc_millis grpc_timespec_to_millis_round_down(gpr_timespec ts) { |
| return timespec_to_millis_round_down( |
| gpr_convert_clock_type(ts, g_start_time.clock_type)); |
| } |
| |
| grpc_millis grpc_timespec_to_millis_round_up(gpr_timespec ts) { |
| return timespec_to_millis_round_up( |
| gpr_convert_clock_type(ts, g_start_time.clock_type)); |
| } |
| |
| static const grpc_closure_scheduler_vtable exec_ctx_scheduler_vtable = { |
| exec_ctx_run, exec_ctx_sched, "exec_ctx"}; |
| static grpc_closure_scheduler exec_ctx_scheduler = {&exec_ctx_scheduler_vtable}; |
| grpc_closure_scheduler* grpc_schedule_on_exec_ctx = &exec_ctx_scheduler; |
| |
| namespace grpc_core { |
| GPR_TLS_CLASS_DEF(ExecCtx::exec_ctx_); |
| |
| // WARNING: for testing purposes only! |
| void ExecCtx::TestOnlyGlobalInit(gpr_timespec new_val) { |
| g_start_time = new_val; |
| gpr_tls_init(&exec_ctx_); |
| } |
| |
| void ExecCtx::GlobalInit(void) { |
| g_start_time = gpr_now(GPR_CLOCK_MONOTONIC); |
| // For debug of the timer manager crash only. |
| // TODO (mxyan): remove after bug is fixed. |
| #ifdef GRPC_DEBUG_TIMER_MANAGER |
| g_start_time_sec = g_start_time.tv_sec; |
| g_start_time_nsec = g_start_time.tv_nsec; |
| #endif |
| gpr_tls_init(&exec_ctx_); |
| } |
| |
| bool ExecCtx::Flush() { |
| bool did_something = 0; |
| GPR_TIMER_SCOPE("grpc_exec_ctx_flush", 0); |
| for (;;) { |
| if (!grpc_closure_list_empty(closure_list_)) { |
| grpc_closure* c = closure_list_.head; |
| closure_list_.head = closure_list_.tail = nullptr; |
| while (c != nullptr) { |
| grpc_closure* next = c->next_data.next; |
| grpc_error* error = c->error_data.error; |
| did_something = true; |
| exec_ctx_run(c, error); |
| c = next; |
| } |
| } else if (!grpc_combiner_continue_exec_ctx()) { |
| break; |
| } |
| } |
| GPR_ASSERT(combiner_data_.active_combiner == nullptr); |
| return did_something; |
| } |
| |
| grpc_millis ExecCtx::Now() { |
| if (!now_is_valid_) { |
| now_ = timespec_to_millis_round_down(gpr_now(GPR_CLOCK_MONOTONIC)); |
| now_is_valid_ = true; |
| } |
| return now_; |
| } |
| |
| } // namespace grpc_core |