mirror of https://github.com/grpc/grpc.git
[promises] Eliminate switch.h (#30317)
* [promises] Eliminate switch.h Instead build a jump table that we can index into and call the appropriate function. Means that the dispatch mechanism can be done in C++ without a code generator, and so eliminates a bunch of fiddly code. * fix * ensure static initialization * Automated change: Fix sanity tests Co-authored-by: ctiller <ctiller@users.noreply.github.com>pull/30515/head
Craig Tiller
2 years ago
committed by
GitHub
parent
ebfb028a29
commit
c866d65966
11 changed files with 27 additions and 1572 deletions
File diff suppressed because it is too large
Load Diff
@ -1,75 +0,0 @@ |
||||
#!/usr/bin/env python3 |
||||
|
||||
# Copyright 2021 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. |
||||
|
||||
import sys |
||||
|
||||
|
||||
# utility: print a big comment block into a set of files |
||||
def put_banner(files, banner): |
||||
for f in files: |
||||
print('/*', file=f) |
||||
for line in banner: |
||||
print(' * %s' % line, file=f) |
||||
print(' */', file=f) |
||||
print('', file=f) |
||||
|
||||
|
||||
with open('src/core/lib/promise/detail/switch.h', 'w') as H: |
||||
# copy-paste copyright notice from this file |
||||
with open(sys.argv[0]) as my_source: |
||||
copyright = [] |
||||
for line in my_source: |
||||
if line[0] != '#': |
||||
break |
||||
for line in my_source: |
||||
if line[0] == '#': |
||||
copyright.append(line) |
||||
break |
||||
for line in my_source: |
||||
if line[0] != '#': |
||||
break |
||||
copyright.append(line) |
||||
put_banner([H], [line[2:].rstrip() for line in copyright]) |
||||
|
||||
put_banner([H], ["Automatically generated by %s" % sys.argv[0]]) |
||||
|
||||
print("#ifndef GRPC_CORE_LIB_PROMISE_DETAIL_SWITCH_H", file=H) |
||||
print("#define GRPC_CORE_LIB_PROMISE_DETAIL_SWITCH_H", file=H) |
||||
print('', file=H) |
||||
print('#include <grpc/impl/codegen/port_platform.h>', file=H) |
||||
print('', file=H) |
||||
print("#include <stdlib.h>", file=H) |
||||
print('', file=H) |
||||
print("namespace grpc_core {", file=H) |
||||
|
||||
for n in range(1, 33): |
||||
print('', file=H) |
||||
print("template <typename R, %s> R Switch(char idx, %s) {" % ( |
||||
", ".join("typename F%d" % i for i in range(0, n)), |
||||
", ".join("F%d f%d" % (i, i) for i in range(0, n)), |
||||
), |
||||
file=H) |
||||
print(" switch (idx) {", file=H) |
||||
for i in range(0, n): |
||||
print(" case %d: return f%d();" % (i, i), file=H) |
||||
print(" }", file=H) |
||||
print(" abort();", file=H) |
||||
print("}", file=H) |
||||
|
||||
print('', file=H) |
||||
print("}", file=H) |
||||
print('', file=H) |
||||
print("#endif // GRPC_CORE_LIB_PROMISE_DETAIL_SWITCH_H", file=H) |
||||
Loading…
Reference in new issue