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68 lines
1.8 KiB
C
68 lines
1.8 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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#ifndef LABWC_MACROS_H
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#define LABWC_MACROS_H
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#include <limits.h>
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#include <wlr/version.h>
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/**
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* ARRAY_SIZE() - Get the number of elements in array.
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* @arr: array to be sized
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*
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* This does not work on pointers.
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*
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* Recent versions of GCC and clang support -Werror=sizeof-pointer-div
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* and thus avoids using constructs such as:
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*
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* #define same_type(a, b) (__builtin_types_compatible_p(typeof(a), typeof(b)) == 1)
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* #define ARRAY_SIZE(a) ({ static_assert(!same_type(a, &(a)[0])); sizeof(a) / sizeof(a[0]); })
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*/
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#define ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0]))
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/**
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* CONNECT_SIGNAL() - Connect a signal handler function to a wl_signal.
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*
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* @param src Signal emitter (struct containing wl_signal)
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* @param dest Signal receiver (struct containing wl_listener)
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* @param name Signal name
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*
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* This assumes that the common pattern is followed where:
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* - the wl_signal is (*src).events.<name>
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* - the wl_listener is (*dest).<name>
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* - the signal handler function is named handle_<name>
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*/
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#define CONNECT_SIGNAL(src, dest, name) \
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(dest)->name.notify = handle_##name; \
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wl_signal_add(&(src)->events.name, &(dest)->name)
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/**
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* MIN() - Minimum of two values.
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*
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* @note Arguments may be evaluated twice.
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*/
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#ifndef MIN
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#define MIN(a, b) (((a) < (b)) ? (a) : (b))
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#endif
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/**
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* MAX() - Maximum of two values.
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*
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* @note Arguments may be evaluated twice.
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*/
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#ifndef MAX
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#define MAX(a, b) (((a) > (b)) ? (a) : (b))
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#endif
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/**
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* BOUNDED_INT() - Returns true if an integer is not INT_MAX or INT_MIN
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*
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* @param val Value to test (integer)
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*/
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#ifndef BOUNDED_INT
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#define BOUNDED_INT(a) ((a) < INT_MAX && (a) > INT_MIN)
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#endif
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#define LAB_WLR_VERSION_AT_LEAST(major, minor, micro) \
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(WLR_VERSION_NUM >= (((major) << 16) | ((minor) << 8) | (micro)))
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#endif /* LABWC_MACROS_H */
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