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error: add error_set_errno and error_setg_errno

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These functions help maintaining homogeneous formatting of error
messages that include strerror values.

Acked-by: Luiz Capitulino <lcapitulino@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Paolo Bonzini 2012-10-02 09:00:45 +02:00
parent da124e62de
commit 680d16dcb7
2 changed files with 37 additions and 0 deletions
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9
error.h
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@ -29,11 +29,20 @@ typedef struct Error Error;
*/
void error_set(Error **err, ErrorClass err_class, const char *fmt, ...) GCC_FMT_ATTR(3, 4);
/**
* Set an indirect pointer to an error given a ErrorClass value and a
* printf-style human message, followed by a strerror() string if
* @os_error is not zero.
*/
void error_set_errno(Error **err, int os_error, ErrorClass err_class, const char *fmt, ...) GCC_FMT_ATTR(4, 5);
/**
* Same as error_set(), but sets a generic error
*/
#define error_setg(err, fmt, ...) \
error_set(err, ERROR_CLASS_GENERIC_ERROR, fmt, ## __VA_ARGS__)
#define error_setg_errno(err, os_error, fmt, ...) \
error_set_errno(err, os_error, ERROR_CLASS_GENERIC_ERROR, fmt, ## __VA_ARGS__)
/**
* Returns true if an indirect pointer to an error is pointing to a valid