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https://gitlab.freedesktop.org/NetworkManager/NetworkManager.git
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cc35dc3bdf
"nm-device-logging.h" defines logging macros for a NMDevice instance. It also expects a "self" variable in the call environment, and that variable had to be in the type of NMDevice or the NMDevice subclass. Extend the macro foo, so that @self can be either a NMDevice* pointer or a NMDevice$SUBTYPE. Of course, that would have always been possible, if we would simply cast to "(NMDevice *)" where we need it. The trick is that the macro only works if @self is one of the two expected types, and not some arbitrary unrelated type.
47 lines
2.6 KiB
C
47 lines
2.6 KiB
C
/* SPDX-License-Identifier: GPL-2.0+ */
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/*
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* Copyright (C) 2014 Red Hat, Inc.
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*/
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#ifndef __NETWORKMANAGER_DEVICE_LOGGING_H__
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#define __NETWORKMANAGER_DEVICE_LOGGING_H__
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#include "nm-device.h"
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#if !_NM_CC_SUPPORT_GENERIC
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#define _NM_DEVICE_CAST(self) ((NMDevice *) (self))
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#elif !defined(_NMLOG_DEVICE_TYPE)
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#define _NM_DEVICE_CAST(self) _NM_ENSURE_TYPE(NMDevice *, self)
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#else
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#define _NM_DEVICE_CAST(self) \
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_Generic((self), _NMLOG_DEVICE_TYPE * \
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: ((NMDevice *) (self)), NMDevice * \
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: ((NMDevice *) (self)))
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#endif
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#undef _NMLOG_ENABLED
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#define _NMLOG_ENABLED(level, domain) (nm_logging_enabled((level), (domain)))
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#define _NMLOG(level, domain, ...) \
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G_STMT_START \
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{ \
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const NMLogLevel _level = (level); \
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const NMLogDomain _domain = (domain); \
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\
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if (nm_logging_enabled(_level, _domain)) { \
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typeof(*self) *const _self = (self); \
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const char *const _ifname = _nm_device_get_iface(_NM_DEVICE_CAST(_self)); \
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\
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nm_log_obj(_level, \
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_domain, \
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_ifname, \
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NULL, \
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_self, \
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"device", \
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"%s%s%s: " _NM_UTILS_MACRO_FIRST(__VA_ARGS__), \
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NM_PRINT_FMT_QUOTED(_ifname, "(", _ifname, ")", "[null]") \
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_NM_UTILS_MACRO_REST(__VA_ARGS__)); \
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} \
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} \
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G_STMT_END
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#endif /* __NETWORKMANAGER_DEVICE_LOGGING_H__ */
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