mirror of https://gitee.com/openkylin/qemu.git
182 lines
3.5 KiB
C
182 lines
3.5 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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#include "qemu-common.h"
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#include "qapi/error.h"
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#include "qapi/qmp/qjson.h"
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#include "qapi/qmp/qdict.h"
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#include "qapi-types.h"
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#include "qapi/qmp/qerror.h"
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struct Error
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{
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char *msg;
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ErrorClass err_class;
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};
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Error *error_abort;
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void error_set(Error **errp, ErrorClass err_class, const char *fmt, ...)
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{
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Error *err;
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va_list ap;
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int saved_errno = errno;
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if (errp == NULL) {
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return;
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}
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assert(*errp == NULL);
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err = g_malloc0(sizeof(*err));
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va_start(ap, fmt);
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err->msg = g_strdup_vprintf(fmt, ap);
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va_end(ap);
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err->err_class = err_class;
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if (errp == &error_abort) {
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error_report("%s", error_get_pretty(err));
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abort();
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}
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*errp = err;
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errno = saved_errno;
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}
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void error_set_errno(Error **errp, int os_errno, ErrorClass err_class,
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const char *fmt, ...)
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{
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Error *err;
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char *msg1;
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va_list ap;
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int saved_errno = errno;
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if (errp == NULL) {
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return;
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}
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assert(*errp == NULL);
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err = g_malloc0(sizeof(*err));
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va_start(ap, fmt);
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msg1 = g_strdup_vprintf(fmt, ap);
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if (os_errno != 0) {
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err->msg = g_strdup_printf("%s: %s", msg1, strerror(os_errno));
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g_free(msg1);
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} else {
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err->msg = msg1;
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}
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va_end(ap);
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err->err_class = err_class;
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if (errp == &error_abort) {
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error_report("%s", error_get_pretty(err));
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abort();
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}
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*errp = err;
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errno = saved_errno;
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}
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void error_setg_file_open(Error **errp, int os_errno, const char *filename)
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{
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error_setg_errno(errp, os_errno, "Could not open '%s'", filename);
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}
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#ifdef _WIN32
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void error_set_win32(Error **errp, int win32_err, ErrorClass err_class,
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const char *fmt, ...)
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{
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Error *err;
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char *msg1;
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va_list ap;
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if (errp == NULL) {
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return;
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}
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assert(*errp == NULL);
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err = g_malloc0(sizeof(*err));
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va_start(ap, fmt);
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msg1 = g_strdup_vprintf(fmt, ap);
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if (win32_err != 0) {
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char *msg2 = g_win32_error_message(win32_err);
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err->msg = g_strdup_printf("%s: %s (error: %x)", msg1, msg2,
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(unsigned)win32_err);
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g_free(msg2);
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g_free(msg1);
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} else {
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err->msg = msg1;
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}
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va_end(ap);
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err->err_class = err_class;
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if (errp == &error_abort) {
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error_report("%s", error_get_pretty(err));
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abort();
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}
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*errp = err;
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}
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#endif
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Error *error_copy(const Error *err)
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{
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Error *err_new;
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err_new = g_malloc0(sizeof(*err));
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err_new->msg = g_strdup(err->msg);
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err_new->err_class = err->err_class;
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return err_new;
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}
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bool error_is_set(Error **errp)
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{
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return (errp && *errp);
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}
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ErrorClass error_get_class(const Error *err)
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{
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return err->err_class;
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}
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const char *error_get_pretty(Error *err)
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{
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return err->msg;
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}
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void error_free(Error *err)
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{
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if (err) {
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g_free(err->msg);
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g_free(err);
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}
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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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if (local_err && dst_err == &error_abort) {
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error_report("%s", error_get_pretty(local_err));
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abort();
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} else if (dst_err && !*dst_err) {
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*dst_err = local_err;
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} else if (local_err) {
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error_free(local_err);
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}
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}
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