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d5ec4f27c3
New error-handling framework that allows for exception-like error propagation. Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com> Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
71 lines
1.7 KiB
C
71 lines
1.7 KiB
C
/*
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* QEMU Error Objects
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*
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* Copyright IBM, Corp. 2011
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*
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* Authors:
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* Anthony Liguori <aliguori@us.ibm.com>
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*
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* This work is licensed under the terms of the GNU LGPL, version 2. See
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* the COPYING.LIB file in the top-level directory.
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*/
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#ifndef ERROR_H
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#define ERROR_H
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#include <stdbool.h>
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/**
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* A class representing internal errors within QEMU. An error has a string
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* typename and optionally a set of named string parameters.
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*/
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typedef struct Error Error;
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/**
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* Set an indirect pointer to an error given a printf-style format parameter.
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* Currently, qerror.h defines these error formats. This function is not
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* meant to be used outside of QEMU.
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*/
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void error_set(Error **err, const char *fmt, ...)
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__attribute__((format(printf, 2, 3)));
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/**
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* Returns true if an indirect pointer to an error is pointing to a valid
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* error object.
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*/
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bool error_is_set(Error **err);
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/**
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* Get a human readable representation of an error object.
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*/
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const char *error_get_pretty(Error *err);
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/**
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* Get an individual named error field.
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*/
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const char *error_get_field(Error *err, const char *field);
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/**
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* Get an individual named error field.
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*/
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void error_set_field(Error *err, const char *field, const char *value);
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/**
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* Propagate an error to an indirect pointer to an error. This function will
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* always transfer ownership of the error reference and handles the case where
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* dst_err is NULL correctly.
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*/
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void error_propagate(Error **dst_err, Error *local_err);
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/**
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* Free an error object.
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*/
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void error_free(Error *err);
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/**
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* Determine if an error is of a speific type (based on the qerror format).
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* Non-QEMU users should get the `class' field to identify the error type.
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*/
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bool error_is_type(Error *err, const char *fmt);
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#endif
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