diff mbox

[05/13] error: define struct Error in only one place

Message ID 1382058681-14957-6-git-send-email-xiawenc@linux.vnet.ibm.com
State New
Headers show

Commit Message

Wayne Xia Oct. 18, 2013, 1:11 a.m. UTC
Signed-off-by: Wenchao Xia <xiawenc@linux.vnet.ibm.com>
---
 include/qapi/error.h |    5 ++++-
 qobject/qerror.c     |    7 -------
 util/error.c         |    6 ------
 3 files changed, 4 insertions(+), 14 deletions(-)

Comments

Paolo Bonzini Oct. 18, 2013, 9:37 a.m. UTC | #1
Il 18/10/2013 03:11, Wenchao Xia ha scritto:
> Signed-off-by: Wenchao Xia <xiawenc@linux.vnet.ibm.com>
> ---
>  include/qapi/error.h |    5 ++++-
>  qobject/qerror.c     |    7 -------
>  util/error.c         |    6 ------
>  3 files changed, 4 insertions(+), 14 deletions(-)
> 
> diff --git a/include/qapi/error.h b/include/qapi/error.h
> index 7d4c696..8688aaf 100644
> --- a/include/qapi/error.h
> +++ b/include/qapi/error.h
> @@ -20,7 +20,10 @@
>   * A class representing internal errors within QEMU.  An error has a ErrorClass
>   * code and a human message.
>   */
> -typedef struct Error Error;
> +typedef struct Error {
> +    char *msg;
> +    ErrorClass err_class;
> +} Error;

Please add a comment that it should be treated as an opaque type.

Paolo

>  
>  /**
>   * Set an indirect pointer to an error given a ErrorClass value and a
> diff --git a/qobject/qerror.c b/qobject/qerror.c
> index 3aee1cf..5b487f3 100644
> --- a/qobject/qerror.c
> +++ b/qobject/qerror.c
> @@ -97,13 +97,6 @@ void qerror_report(ErrorClass eclass, const char *fmt, ...)
>      }
>  }
>  
> -/* Evil... */
> -struct Error
> -{
> -    char *msg;
> -    ErrorClass err_class;
> -};
> -
>  void qerror_report_err(Error *err)
>  {
>      QError *qerr;
> diff --git a/util/error.c b/util/error.c
> index ec0faa6..da0d221 100644
> --- a/util/error.c
> +++ b/util/error.c
> @@ -17,12 +17,6 @@
>  #include "qapi-types.h"
>  #include "qapi/qmp/qerror.h"
>  
> -struct Error
> -{
> -    char *msg;
> -    ErrorClass err_class;
> -};
> -
>  void error_set(Error **errp, ErrorClass err_class, const char *fmt, ...)
>  {
>      Error *err;
>
Markus Armbruster Oct. 18, 2013, 11:22 a.m. UTC | #2
Paolo Bonzini <pbonzini@redhat.com> writes:

> Il 18/10/2013 03:11, Wenchao Xia ha scritto:
>> Signed-off-by: Wenchao Xia <xiawenc@linux.vnet.ibm.com>
>> ---
>>  include/qapi/error.h |    5 ++++-
>>  qobject/qerror.c     |    7 -------
>>  util/error.c         |    6 ------
>>  3 files changed, 4 insertions(+), 14 deletions(-)
>> 
>> diff --git a/include/qapi/error.h b/include/qapi/error.h
>> index 7d4c696..8688aaf 100644
>> --- a/include/qapi/error.h
>> +++ b/include/qapi/error.h
>> @@ -20,7 +20,10 @@
>>   * A class representing internal errors within QEMU.  An error has a ErrorClass
>>   * code and a human message.
>>   */
>> -typedef struct Error Error;
>> +typedef struct Error {
>> +    char *msg;
>> +    ErrorClass err_class;
>> +} Error;
>
> Please add a comment that it should be treated as an opaque type.

Or keep it opaque here, and complete the type in an internal header.
But see below.

>
> Paolo
>
>>  
>>  /**
>>   * Set an indirect pointer to an error given a ErrorClass value and a
>> diff --git a/qobject/qerror.c b/qobject/qerror.c
>> index 3aee1cf..5b487f3 100644
>> --- a/qobject/qerror.c
>> +++ b/qobject/qerror.c
>> @@ -97,13 +97,6 @@ void qerror_report(ErrorClass eclass, const char *fmt, ...)
>>      }
>>  }
>>  
>> -/* Evil... */
>> -struct Error
>> -{
>> -    char *msg;
>> -    ErrorClass err_class;
>> -};
>> -
>>  void qerror_report_err(Error *err)
>>  {
>>      QError *qerr;

        qerr = qerror_new();
        loc_save(&qerr->loc);
        qerr->err_msg = g_strdup(err->msg);
        qerr->err_class = err->err_class;

        if (monitor_cur_is_qmp()) {
            monitor_set_error(cur_mon, qerr);
        } else {
            qerror_print(qerr);
            QDECREF(qerr);
        }
    }

This is the only use of the "evil" duplicate.  I suspect it could be
cleaned up like this:

        qerr->err_msg = g_strdup(error_get_pretty(err));
        qerr->err_class = error_get_class(err);

If that's true, the duplicate goes away, and we can keep the type
opaque.

>> diff --git a/util/error.c b/util/error.c
>> index ec0faa6..da0d221 100644
>> --- a/util/error.c
>> +++ b/util/error.c
>> @@ -17,12 +17,6 @@
>>  #include "qapi-types.h"
>>  #include "qapi/qmp/qerror.h"
>>  
>> -struct Error
>> -{
>> -    char *msg;
>> -    ErrorClass err_class;
>> -};
>> -
>>  void error_set(Error **errp, ErrorClass err_class, const char *fmt, ...)
>>  {
>>      Error *err;
>>
Wayne Xia Oct. 21, 2013, 2:46 a.m. UTC | #3
于 2013/10/18 19:22, Markus Armbruster 写道:
> Paolo Bonzini <pbonzini@redhat.com> writes:
>
>> Il 18/10/2013 03:11, Wenchao Xia ha scritto:
>>> Signed-off-by: Wenchao Xia <xiawenc@linux.vnet.ibm.com>
>>> ---
>>>  include/qapi/error.h |    5 ++++-
>>>  qobject/qerror.c     |    7 -------
>>>  util/error.c         |    6 ------
>>>  3 files changed, 4 insertions(+), 14 deletions(-)
>>>
>>> diff --git a/include/qapi/error.h b/include/qapi/error.h
>>> index 7d4c696..8688aaf 100644
>>> --- a/include/qapi/error.h
>>> +++ b/include/qapi/error.h
>>> @@ -20,7 +20,10 @@
>>>   * A class representing internal errors within QEMU.  An error has a ErrorClass
>>>   * code and a human message.
>>>   */
>>> -typedef struct Error Error;
>>> +typedef struct Error {
>>> +    char *msg;
>>> +    ErrorClass err_class;
>>> +} Error;
>> Please add a comment that it should be treated as an opaque type.
> Or keep it opaque here, and complete the type in an internal header.
> But see below.
>
>> Paolo
>>
>>>  
>>>  /**
>>>   * Set an indirect pointer to an error given a ErrorClass value and a
>>> diff --git a/qobject/qerror.c b/qobject/qerror.c
>>> index 3aee1cf..5b487f3 100644
>>> --- a/qobject/qerror.c
>>> +++ b/qobject/qerror.c
>>> @@ -97,13 +97,6 @@ void qerror_report(ErrorClass eclass, const char *fmt, ...)
>>>      }
>>>  }
>>>  
>>> -/* Evil... */
>>> -struct Error
>>> -{
>>> -    char *msg;
>>> -    ErrorClass err_class;
>>> -};
>>> -
>>>  void qerror_report_err(Error *err)
>>>  {
>>>      QError *qerr;
>         qerr = qerror_new();
>         loc_save(&qerr->loc);
>         qerr->err_msg = g_strdup(err->msg);
>         qerr->err_class = err->err_class;
>
>         if (monitor_cur_is_qmp()) {
>             monitor_set_error(cur_mon, qerr);
>         } else {
>             qerror_print(qerr);
>             QDECREF(qerr);
>         }
>     }
>
> This is the only use of the "evil" duplicate.  I suspect it could be
> cleaned up like this:
>
>         qerr->err_msg = g_strdup(error_get_pretty(err));
>         qerr->err_class = error_get_class(err);
>
> If that's true, the duplicate goes away, and we can keep the type
> opaque.
seems a smart idea, will use it.


>>> diff --git a/util/error.c b/util/error.c
>>> index ec0faa6..da0d221 100644
>>> --- a/util/error.c
>>> +++ b/util/error.c
>>> @@ -17,12 +17,6 @@
>>>  #include "qapi-types.h"
>>>  #include "qapi/qmp/qerror.h"
>>>  
>>> -struct Error
>>> -{
>>> -    char *msg;
>>> -    ErrorClass err_class;
>>> -};
>>> -
>>>  void error_set(Error **errp, ErrorClass err_class, const char *fmt, ...)
>>>  {
>>>      Error *err;
>>>
diff mbox

Patch

diff --git a/include/qapi/error.h b/include/qapi/error.h
index 7d4c696..8688aaf 100644
--- a/include/qapi/error.h
+++ b/include/qapi/error.h
@@ -20,7 +20,10 @@ 
  * A class representing internal errors within QEMU.  An error has a ErrorClass
  * code and a human message.
  */
-typedef struct Error Error;
+typedef struct Error {
+    char *msg;
+    ErrorClass err_class;
+} Error;
 
 /**
  * Set an indirect pointer to an error given a ErrorClass value and a
diff --git a/qobject/qerror.c b/qobject/qerror.c
index 3aee1cf..5b487f3 100644
--- a/qobject/qerror.c
+++ b/qobject/qerror.c
@@ -97,13 +97,6 @@  void qerror_report(ErrorClass eclass, const char *fmt, ...)
     }
 }
 
-/* Evil... */
-struct Error
-{
-    char *msg;
-    ErrorClass err_class;
-};
-
 void qerror_report_err(Error *err)
 {
     QError *qerr;
diff --git a/util/error.c b/util/error.c
index ec0faa6..da0d221 100644
--- a/util/error.c
+++ b/util/error.c
@@ -17,12 +17,6 @@ 
 #include "qapi-types.h"
 #include "qapi/qmp/qerror.h"
 
-struct Error
-{
-    char *msg;
-    ErrorClass err_class;
-};
-
 void error_set(Error **errp, ErrorClass err_class, const char *fmt, ...)
 {
     Error *err;