--- /dev/null
+/*
+ *
+ * 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 <grpc/support/alloc.h>
+#include <grpc/support/log.h>
+#include "src/core/lib/channel/channel_stack.h"
+#include "src/core/lib/gpr/alloc.h"
+
+#include <stdlib.h>
+#include <string.h>
+
+grpc_core::TraceFlag grpc_trace_channel(false, "channel");
+
+/* Memory layouts.
+
+ Channel stack is laid out as: {
+ grpc_channel_stack stk;
+ padding to GPR_MAX_ALIGNMENT
+ grpc_channel_element[stk.count];
+ per-filter memory, aligned to GPR_MAX_ALIGNMENT
+ }
+
+ Call stack is laid out as: {
+ grpc_call_stack stk;
+ padding to GPR_MAX_ALIGNMENT
+ grpc_call_element[stk.count];
+ per-filter memory, aligned to GPR_MAX_ALIGNMENT
+ } */
+
+size_t grpc_channel_stack_size(const grpc_channel_filter** filters,
+ size_t filter_count) {
+ /* always need the header, and size for the channel elements */
+ size_t size = GPR_ROUND_UP_TO_ALIGNMENT_SIZE(sizeof(grpc_channel_stack)) +
+ GPR_ROUND_UP_TO_ALIGNMENT_SIZE(filter_count *
+ sizeof(grpc_channel_element));
+ size_t i;
+
+ GPR_ASSERT((GPR_MAX_ALIGNMENT & (GPR_MAX_ALIGNMENT - 1)) == 0 &&
+ "GPR_MAX_ALIGNMENT must be a power of two");
+
+ /* add the size for each filter */
+ for (i = 0; i < filter_count; i++) {
+ size += GPR_ROUND_UP_TO_ALIGNMENT_SIZE(filters[i]->sizeof_channel_data);
+ }
+
+ return size;
+}
+
+#define CHANNEL_ELEMS_FROM_STACK(stk) \
+ ((grpc_channel_element*)((char*)(stk) + GPR_ROUND_UP_TO_ALIGNMENT_SIZE( \
+ sizeof(grpc_channel_stack))))
+
+#define CALL_ELEMS_FROM_STACK(stk) \
+ ((grpc_call_element*)((char*)(stk) + GPR_ROUND_UP_TO_ALIGNMENT_SIZE( \
+ sizeof(grpc_call_stack))))
+
+grpc_channel_element* grpc_channel_stack_element(
+ grpc_channel_stack* channel_stack, size_t index) {
+ return CHANNEL_ELEMS_FROM_STACK(channel_stack) + index;
+}
+
+grpc_channel_element* grpc_channel_stack_last_element(
+ grpc_channel_stack* channel_stack) {
+ return grpc_channel_stack_element(channel_stack, channel_stack->count - 1);
+}
+
+grpc_call_element* grpc_call_stack_element(grpc_call_stack* call_stack,
+ size_t index) {
+ return CALL_ELEMS_FROM_STACK(call_stack) + index;
+}
+
+grpc_error* grpc_channel_stack_init(
+ int initial_refs, grpc_iomgr_cb_func destroy, void* destroy_arg,
+ const grpc_channel_filter** filters, size_t filter_count,
+ const grpc_channel_args* channel_args, grpc_transport* optional_transport,
+ const char* name, grpc_channel_stack* stack) {
+ size_t call_size =
+ GPR_ROUND_UP_TO_ALIGNMENT_SIZE(sizeof(grpc_call_stack)) +
+ GPR_ROUND_UP_TO_ALIGNMENT_SIZE(filter_count * sizeof(grpc_call_element));
+ grpc_channel_element* elems;
+ grpc_channel_element_args args;
+ char* user_data;
+ size_t i;
+
+ stack->count = filter_count;
+ GRPC_STREAM_REF_INIT(&stack->refcount, initial_refs, destroy, destroy_arg,
+ name);
+ elems = CHANNEL_ELEMS_FROM_STACK(stack);
+ user_data = (reinterpret_cast<char*>(elems)) +
+ GPR_ROUND_UP_TO_ALIGNMENT_SIZE(filter_count *
+ sizeof(grpc_channel_element));
+
+ /* init per-filter data */
+ grpc_error* first_error = GRPC_ERROR_NONE;
+ for (i = 0; i < filter_count; i++) {
+ args.channel_stack = stack;
+ args.channel_args = channel_args;
+ args.optional_transport = optional_transport;
+ args.is_first = i == 0;
+ args.is_last = i == (filter_count - 1);
+ elems[i].filter = filters[i];
+ elems[i].channel_data = user_data;
+ grpc_error* error = elems[i].filter->init_channel_elem(&elems[i], &args);
+ if (error != GRPC_ERROR_NONE) {
+ if (first_error == GRPC_ERROR_NONE) {
+ first_error = error;
+ } else {
+ GRPC_ERROR_UNREF(error);
+ }
+ }
+ user_data +=
+ GPR_ROUND_UP_TO_ALIGNMENT_SIZE(filters[i]->sizeof_channel_data);
+ call_size += GPR_ROUND_UP_TO_ALIGNMENT_SIZE(filters[i]->sizeof_call_data);
+ }
+
+ GPR_ASSERT(user_data > (char*)stack);
+ GPR_ASSERT((uintptr_t)(user_data - (char*)stack) ==
+ grpc_channel_stack_size(filters, filter_count));
+
+ stack->call_stack_size = call_size;
+ return first_error;
+}
+
+void grpc_channel_stack_destroy(grpc_channel_stack* stack) {
+ grpc_channel_element* channel_elems = CHANNEL_ELEMS_FROM_STACK(stack);
+ size_t count = stack->count;
+ size_t i;
+
+ /* destroy per-filter data */
+ for (i = 0; i < count; i++) {
+ channel_elems[i].filter->destroy_channel_elem(&channel_elems[i]);
+ }
+}
+
+grpc_error* grpc_call_stack_init(grpc_channel_stack* channel_stack,
+ int initial_refs, grpc_iomgr_cb_func destroy,
+ void* destroy_arg,
+ const grpc_call_element_args* elem_args) {
+ grpc_channel_element* channel_elems = CHANNEL_ELEMS_FROM_STACK(channel_stack);
+ size_t count = channel_stack->count;
+ grpc_call_element* call_elems;
+ char* user_data;
+
+ elem_args->call_stack->count = count;
+ GRPC_STREAM_REF_INIT(&elem_args->call_stack->refcount, initial_refs, destroy,
+ destroy_arg, "CALL_STACK");
+ call_elems = CALL_ELEMS_FROM_STACK(elem_args->call_stack);
+ user_data = (reinterpret_cast<char*>(call_elems)) +
+ GPR_ROUND_UP_TO_ALIGNMENT_SIZE(count * sizeof(grpc_call_element));
+
+ /* init per-filter data */
+ grpc_error* first_error = GRPC_ERROR_NONE;
+ for (size_t i = 0; i < count; i++) {
+ call_elems[i].filter = channel_elems[i].filter;
+ call_elems[i].channel_data = channel_elems[i].channel_data;
+ call_elems[i].call_data = user_data;
+ user_data +=
+ GPR_ROUND_UP_TO_ALIGNMENT_SIZE(call_elems[i].filter->sizeof_call_data);
+ }
+ for (size_t i = 0; i < count; i++) {
+ grpc_error* error =
+ call_elems[i].filter->init_call_elem(&call_elems[i], elem_args);
+ if (error != GRPC_ERROR_NONE) {
+ if (first_error == GRPC_ERROR_NONE) {
+ first_error = error;
+ } else {
+ GRPC_ERROR_UNREF(error);
+ }
+ }
+ }
+ return first_error;
+}
+
+void grpc_call_stack_set_pollset_or_pollset_set(grpc_call_stack* call_stack,
+ grpc_polling_entity* pollent) {
+ size_t count = call_stack->count;
+ grpc_call_element* call_elems;
+ size_t i;
+
+ call_elems = CALL_ELEMS_FROM_STACK(call_stack);
+
+ /* init per-filter data */
+ for (i = 0; i < count; i++) {
+ call_elems[i].filter->set_pollset_or_pollset_set(&call_elems[i], pollent);
+ }
+}
+
+void grpc_call_stack_ignore_set_pollset_or_pollset_set(
+ grpc_call_element* elem, grpc_polling_entity* pollent) {}
+
+void grpc_call_stack_destroy(grpc_call_stack* stack,
+ const grpc_call_final_info* final_info,
+ grpc_closure* then_schedule_closure) {
+ grpc_call_element* elems = CALL_ELEMS_FROM_STACK(stack);
+ size_t count = stack->count;
+ size_t i;
+
+ /* destroy per-filter data */
+ for (i = 0; i < count; i++) {
+ elems[i].filter->destroy_call_elem(
+ &elems[i], final_info,
+ i == count - 1 ? then_schedule_closure : nullptr);
+ }
+}
+
+void grpc_call_next_op(grpc_call_element* elem,
+ grpc_transport_stream_op_batch* op) {
+ grpc_call_element* next_elem = elem + 1;
+ GRPC_CALL_LOG_OP(GPR_INFO, next_elem, op);
+ next_elem->filter->start_transport_stream_op_batch(next_elem, op);
+}
+
+void grpc_channel_next_get_info(grpc_channel_element* elem,
+ const grpc_channel_info* channel_info) {
+ grpc_channel_element* next_elem = elem + 1;
+ next_elem->filter->get_channel_info(next_elem, channel_info);
+}
+
+void grpc_channel_next_op(grpc_channel_element* elem, grpc_transport_op* op) {
+ grpc_channel_element* next_elem = elem + 1;
+ next_elem->filter->start_transport_op(next_elem, op);
+}
+
+grpc_channel_stack* grpc_channel_stack_from_top_element(
+ grpc_channel_element* elem) {
+ return reinterpret_cast<grpc_channel_stack*>(
+ reinterpret_cast<char*>(elem) -
+ GPR_ROUND_UP_TO_ALIGNMENT_SIZE(sizeof(grpc_channel_stack)));
+}
+
+grpc_call_stack* grpc_call_stack_from_top_element(grpc_call_element* elem) {
+ return reinterpret_cast<grpc_call_stack*>(
+ reinterpret_cast<char*>(elem) -
+ GPR_ROUND_UP_TO_ALIGNMENT_SIZE(sizeof(grpc_call_stack)));
+}
git://repos.xcallymotion.com / motion2.git / blobdiff