| Message ID | 20221116122241.2856527-5-eesposit@redhat.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | Still more coroutine and various fixes in block layer | expand |
Am 16.11.2022 um 13:22 hat Emanuele Giuseppe Esposito geschrieben: > This new annotation creates just a function wrapper that creates > a new coroutine. It assumes the caller is not a coroutine. > > This is much better as g_c_w, because it is clear if the caller > is a coroutine or not, and provides the advantage of automating > the code creation. In the future all g_c_w functions will be > substituted on g_c_w_simple. > > Signed-off-by: Emanuele Giuseppe Esposito <eesposit@redhat.com> $ mypy --strict scripts/block-coroutine-wrapper.py scripts/block-coroutine-wrapper.py:31: error: Function is missing a return type annotation scripts/block-coroutine-wrapper.py:90: error: Missing type parameters for generic type "Iterator" scripts/block-coroutine-wrapper.py:110: error: "FuncDecl" has no attribute "co_name" scripts/block-coroutine-wrapper.py:111: error: "FuncDecl" has no attribute "struct_name" scripts/block-coroutine-wrapper.py:112: error: "FuncDecl" has no attribute "bs" scripts/block-coroutine-wrapper.py:135: error: "FuncDecl" has no attribute "co_name" scripts/block-coroutine-wrapper.py:136: error: "FuncDecl" has no attribute "struct_name" scripts/block-coroutine-wrapper.py:137: error: "FuncDecl" has no attribute "bs" scripts/block-coroutine-wrapper.py:160: error: "FuncDecl" has no attribute "co_name" scripts/block-coroutine-wrapper.py:161: error: "FuncDecl" has no attribute "co_name" scripts/block-coroutine-wrapper.py:172: error: "FuncDecl" has no attribute "bs" scripts/block-coroutine-wrapper.py:173: error: "FuncDecl" has no attribute "struct_name" scripts/block-coroutine-wrapper.py:174: error: "FuncDecl" has no attribute "struct_name" scripts/block-coroutine-wrapper.py:218: error: Call to untyped function "gen_header" in typed context Found 14 errors in 1 file (checked 1 source file) The first two and the last one isn't the fault of this patch, but the others are. When you add new attributes, they should be declared in FuncDecl.__init__(). And actually, this even seems like a better place to initialise them already with the right value than gen_wrapper(). > include/block/block-common.h | 1 + > scripts/block-coroutine-wrapper.py | 87 ++++++++++++++++++++++-------- > 2 files changed, 66 insertions(+), 22 deletions(-) > > diff --git a/include/block/block-common.h b/include/block/block-common.h > index 297704c1e9..8ae750c7cf 100644 > --- a/include/block/block-common.h > +++ b/include/block/block-common.h > @@ -43,6 +43,7 @@ > * Read more in docs/devel/block-coroutine-wrapper.rst > */ > #define generated_co_wrapper > +#define generated_co_wrapper_simple > > /* block.c */ > typedef struct BlockDriver BlockDriver; > diff --git a/scripts/block-coroutine-wrapper.py b/scripts/block-coroutine-wrapper.py > index 08be813407..f88ef53964 100644 > --- a/scripts/block-coroutine-wrapper.py > +++ b/scripts/block-coroutine-wrapper.py > @@ -62,10 +62,15 @@ def __init__(self, param_decl: str) -> None: > > > class FuncDecl: > - def __init__(self, return_type: str, name: str, args: str) -> None: > + def __init__(self, return_type: str, name: str, args: str, > + variant: str) -> None: > self.return_type = return_type.strip() > self.name = name.strip() > self.args = [ParamDecl(arg.strip()) for arg in args.split(',')] > + self.create_only_co = False > + > + if variant == '_simple': > + self.create_only_co = True > > def gen_list(self, format: str) -> str: > return ', '.join(format.format_map(arg.__dict__) for arg in self.args) > @@ -75,7 +80,8 @@ def gen_block(self, format: str) -> str: > > > # Match wrappers declared with a generated_co_wrapper mark > -func_decl_re = re.compile(r'^int\s*generated_co_wrapper\s*' > +func_decl_re = re.compile(r'^int\s*generated_co_wrapper' > + r'(?P<variant>(_[a-z][a-z0-9_]*)?)\s*' > r'(?P<wrapper_name>[a-z][a-z0-9_]*)' > r'\((?P<args>[^)]*)\);$', re.MULTILINE) > > @@ -84,7 +90,8 @@ def func_decl_iter(text: str) -> Iterator: > for m in func_decl_re.finditer(text): > yield FuncDecl(return_type='int', > name=m.group('wrapper_name'), > - args=m.group('args')) > + args=m.group('args'), > + variant=m.group('variant')) > > > def snake_to_camel(func_name: str) -> str: > @@ -97,6 +104,51 @@ def snake_to_camel(func_name: str) -> str: > return ''.join(words) > > > +# Checks if we are already in coroutine > +def create_g_c_w(func: FuncDecl) -> str: > + name = func.co_name > + struct_name = func.struct_name > + return f"""\ > +int {func.name}({ func.gen_list('{decl}') }) > +{{ > + if (qemu_in_coroutine()) {{ > + return {name}({ func.gen_list('{name}') }); > + }} else {{ > + {struct_name} s = {{ > + .poll_state.bs = {func.bs}, > + .poll_state.in_progress = true, > + > +{ func.gen_block(' .{name} = {name},') } > + }}; > + > + s.poll_state.co = qemu_coroutine_create({name}_entry, &s); > + > + return bdrv_poll_co(&s.poll_state); > + }} > +}}""" > + > + > +# Assumes we are not in coroutine, and creates one > +def create_coroutine_only(func: FuncDecl) -> str: > + name = func.co_name > + struct_name = func.struct_name > + return f"""\ > +int {func.name}({ func.gen_list('{decl}') }) > +{{ > + assert(!qemu_in_coroutine()); > + {struct_name} s = {{ > + .poll_state.bs = {func.bs}, > + .poll_state.in_progress = true, > + > +{ func.gen_block(' .{name} = {name},') } > + }}; Not sure how strict we are about this in generated code, but generally the QEMU coding style requires declarations to come first, so the assertion should be below it. > + > + s.poll_state.co = qemu_coroutine_create({name}_entry, &s); > + > + return bdrv_poll_co(&s.poll_state); > +}}""" Kevin
diff --git a/include/block/block-common.h b/include/block/block-common.h index 297704c1e9..8ae750c7cf 100644 --- a/include/block/block-common.h +++ b/include/block/block-common.h @@ -43,6 +43,7 @@ * Read more in docs/devel/block-coroutine-wrapper.rst */ #define generated_co_wrapper +#define generated_co_wrapper_simple /* block.c */ typedef struct BlockDriver BlockDriver; diff --git a/scripts/block-coroutine-wrapper.py b/scripts/block-coroutine-wrapper.py index 08be813407..f88ef53964 100644 --- a/scripts/block-coroutine-wrapper.py +++ b/scripts/block-coroutine-wrapper.py @@ -62,10 +62,15 @@ def __init__(self, param_decl: str) -> None: class FuncDecl: - def __init__(self, return_type: str, name: str, args: str) -> None: + def __init__(self, return_type: str, name: str, args: str, + variant: str) -> None: self.return_type = return_type.strip() self.name = name.strip() self.args = [ParamDecl(arg.strip()) for arg in args.split(',')] + self.create_only_co = False + + if variant == '_simple': + self.create_only_co = True def gen_list(self, format: str) -> str: return ', '.join(format.format_map(arg.__dict__) for arg in self.args) @@ -75,7 +80,8 @@ def gen_block(self, format: str) -> str: # Match wrappers declared with a generated_co_wrapper mark -func_decl_re = re.compile(r'^int\s*generated_co_wrapper\s*' +func_decl_re = re.compile(r'^int\s*generated_co_wrapper' + r'(?P<variant>(_[a-z][a-z0-9_]*)?)\s*' r'(?P<wrapper_name>[a-z][a-z0-9_]*)' r'\((?P<args>[^)]*)\);$', re.MULTILINE) @@ -84,7 +90,8 @@ def func_decl_iter(text: str) -> Iterator: for m in func_decl_re.finditer(text): yield FuncDecl(return_type='int', name=m.group('wrapper_name'), - args=m.group('args')) + args=m.group('args'), + variant=m.group('variant')) def snake_to_camel(func_name: str) -> str: @@ -97,6 +104,51 @@ def snake_to_camel(func_name: str) -> str: return ''.join(words) +# Checks if we are already in coroutine +def create_g_c_w(func: FuncDecl) -> str: + name = func.co_name + struct_name = func.struct_name + return f"""\ +int {func.name}({ func.gen_list('{decl}') }) +{{ + if (qemu_in_coroutine()) {{ + return {name}({ func.gen_list('{name}') }); + }} else {{ + {struct_name} s = {{ + .poll_state.bs = {func.bs}, + .poll_state.in_progress = true, + +{ func.gen_block(' .{name} = {name},') } + }}; + + s.poll_state.co = qemu_coroutine_create({name}_entry, &s); + + return bdrv_poll_co(&s.poll_state); + }} +}}""" + + +# Assumes we are not in coroutine, and creates one +def create_coroutine_only(func: FuncDecl) -> str: + name = func.co_name + struct_name = func.struct_name + return f"""\ +int {func.name}({ func.gen_list('{decl}') }) +{{ + assert(!qemu_in_coroutine()); + {struct_name} s = {{ + .poll_state.bs = {func.bs}, + .poll_state.in_progress = true, + +{ func.gen_block(' .{name} = {name},') } + }}; + + s.poll_state.co = qemu_coroutine_create({name}_entry, &s); + + return bdrv_poll_co(&s.poll_state); +}}""" + + def gen_wrapper(func: FuncDecl) -> str: assert not '_co_' in func.name assert func.return_type == 'int' @@ -105,7 +157,8 @@ def gen_wrapper(func: FuncDecl) -> str: subsystem, subname = func.name.split('_', 1) - name = f'{subsystem}_co_{subname}' + func.co_name = f'{subsystem}_co_{subname}' + name = func.co_name t = func.args[0].type if t == 'BlockDriverState *': @@ -114,7 +167,13 @@ def gen_wrapper(func: FuncDecl) -> str: bs = 'child->bs' else: bs = 'blk_bs(blk)' - struct_name = snake_to_camel(name) + func.bs = bs + func.struct_name = snake_to_camel(func.name) + struct_name = func.struct_name + + creation_function = create_g_c_w + if func.create_only_co: + creation_function = create_coroutine_only return f"""\ /* @@ -136,23 +195,7 @@ def gen_wrapper(func: FuncDecl) -> str: aio_wait_kick(); }} -int {func.name}({ func.gen_list('{decl}') }) -{{ - if (qemu_in_coroutine()) {{ - return {name}({ func.gen_list('{name}') }); - }} else {{ - {struct_name} s = {{ - .poll_state.bs = {bs}, - .poll_state.in_progress = true, - -{ func.gen_block(' .{name} = {name},') } - }}; - - s.poll_state.co = qemu_coroutine_create({name}_entry, &s); - - return bdrv_poll_co(&s.poll_state); - }} -}}""" +{creation_function(func)}""" def gen_wrappers(input_code: str) -> str:
This new annotation creates just a function wrapper that creates a new coroutine. It assumes the caller is not a coroutine. This is much better as g_c_w, because it is clear if the caller is a coroutine or not, and provides the advantage of automating the code creation. In the future all g_c_w functions will be substituted on g_c_w_simple. Signed-off-by: Emanuele Giuseppe Esposito <eesposit@redhat.com> --- include/block/block-common.h | 1 + scripts/block-coroutine-wrapper.py | 87 ++++++++++++++++++++++-------- 2 files changed, 66 insertions(+), 22 deletions(-)