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ad1b3e5094
grpc_byte_buffer_reader_next() copies and references the slice. This
is not always necessary since the caller will not use the slice
after destroying the byte buffer.
A prominent example is the protobuf parser, which
calls grpc_byte_buffer_reader_next() and immediately unrefs the slice
after the call. This ref() and unref() calls can be very expensive
in the hot path.
This commit introduces grpc_byte_buffer_reader_peek() which
essentialy return a pointer to the slice in the buffer, i.e.,
no copies, and no refs.
QPS of 1MiB 1 Channel callback benchmark increases by 5%.
More importantly insructions per cycle is increased by 10%.
Also add tests and benchmarks for byte_buffer_reader_peek()
This commit reaplies 509e77a5a3
127 lines
5.6 KiB
C++
127 lines
5.6 KiB
C++
/*
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*
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* Copyright 2016 gRPC authors.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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*/
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#ifndef GRPCPP_IMPL_CODEGEN_CORE_CODEGEN_H
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#define GRPCPP_IMPL_CODEGEN_CORE_CODEGEN_H
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// This file should be compiled as part of grpcpp.
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#include <grpc/byte_buffer.h>
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#include <grpc/grpc.h>
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#include <grpc/impl/codegen/grpc_types.h>
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#include <grpcpp/impl/codegen/core_codegen_interface.h>
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namespace grpc {
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/// Implementation of the core codegen interface.
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class CoreCodegen final : public CoreCodegenInterface {
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private:
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virtual const grpc_completion_queue_factory*
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grpc_completion_queue_factory_lookup(
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const grpc_completion_queue_attributes* attributes) override;
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virtual grpc_completion_queue* grpc_completion_queue_create(
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const grpc_completion_queue_factory* factory,
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const grpc_completion_queue_attributes* attributes,
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void* reserved) override;
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grpc_completion_queue* grpc_completion_queue_create_for_next(
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void* reserved) override;
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grpc_completion_queue* grpc_completion_queue_create_for_pluck(
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void* reserved) override;
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void grpc_completion_queue_shutdown(grpc_completion_queue* cq) override;
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void grpc_completion_queue_destroy(grpc_completion_queue* cq) override;
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grpc_event grpc_completion_queue_pluck(grpc_completion_queue* cq, void* tag,
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gpr_timespec deadline,
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void* reserved) override;
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void* gpr_malloc(size_t size) override;
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void gpr_free(void* p) override;
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void grpc_init() override;
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void grpc_shutdown() override;
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void gpr_mu_init(gpr_mu* mu) override;
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void gpr_mu_destroy(gpr_mu* mu) override;
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void gpr_mu_lock(gpr_mu* mu) override;
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void gpr_mu_unlock(gpr_mu* mu) override;
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void gpr_cv_init(gpr_cv* cv) override;
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void gpr_cv_destroy(gpr_cv* cv) override;
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int gpr_cv_wait(gpr_cv* cv, gpr_mu* mu, gpr_timespec abs_deadline) override;
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void gpr_cv_signal(gpr_cv* cv) override;
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void gpr_cv_broadcast(gpr_cv* cv) override;
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grpc_call_error grpc_call_start_batch(grpc_call* call, const grpc_op* ops,
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size_t nops, void* tag,
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void* reserved) override;
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grpc_call_error grpc_call_cancel_with_status(grpc_call* call,
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grpc_status_code status,
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const char* description,
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void* reserved) override;
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void grpc_call_ref(grpc_call* call) override;
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void grpc_call_unref(grpc_call* call) override;
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virtual void* grpc_call_arena_alloc(grpc_call* call, size_t length) override;
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grpc_byte_buffer* grpc_byte_buffer_copy(grpc_byte_buffer* bb) override;
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void grpc_byte_buffer_destroy(grpc_byte_buffer* bb) override;
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size_t grpc_byte_buffer_length(grpc_byte_buffer* bb) override;
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int grpc_byte_buffer_reader_init(grpc_byte_buffer_reader* reader,
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grpc_byte_buffer* buffer) override;
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void grpc_byte_buffer_reader_destroy(
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grpc_byte_buffer_reader* reader) override;
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int grpc_byte_buffer_reader_next(grpc_byte_buffer_reader* reader,
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grpc_slice* slice) override;
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int grpc_byte_buffer_reader_peek(grpc_byte_buffer_reader* reader,
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grpc_slice** slice) override;
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grpc_byte_buffer* grpc_raw_byte_buffer_create(grpc_slice* slice,
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size_t nslices) override;
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grpc_slice grpc_slice_new_with_user_data(void* p, size_t len,
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void (*destroy)(void*),
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void* user_data) override;
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grpc_slice grpc_slice_new_with_len(void* p, size_t len,
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void (*destroy)(void*, size_t)) override;
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grpc_slice grpc_empty_slice() override;
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grpc_slice grpc_slice_malloc(size_t length) override;
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void grpc_slice_unref(grpc_slice slice) override;
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grpc_slice grpc_slice_ref(grpc_slice slice) override;
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grpc_slice grpc_slice_split_tail(grpc_slice* s, size_t split) override;
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grpc_slice grpc_slice_split_head(grpc_slice* s, size_t split) override;
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grpc_slice grpc_slice_sub(grpc_slice s, size_t begin, size_t end) override;
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void grpc_slice_buffer_add(grpc_slice_buffer* sb, grpc_slice slice) override;
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void grpc_slice_buffer_pop(grpc_slice_buffer* sb) override;
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grpc_slice grpc_slice_from_static_buffer(const void* buffer,
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size_t length) override;
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grpc_slice grpc_slice_from_copied_buffer(const void* buffer,
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size_t length) override;
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void grpc_metadata_array_init(grpc_metadata_array* array) override;
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void grpc_metadata_array_destroy(grpc_metadata_array* array) override;
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gpr_timespec gpr_inf_future(gpr_clock_type type) override;
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gpr_timespec gpr_time_0(gpr_clock_type type) override;
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virtual const Status& ok() override;
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virtual const Status& cancelled() override;
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void assert_fail(const char* failed_assertion, const char* file,
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int line) override;
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};
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} // namespace grpc
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#endif // GRPCPP_IMPL_CODEGEN_CORE_CODEGEN_H
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