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4b59818fd4
Much like the auto-closing helper for file descriptors, add a new auto-free helper that is meant to be used with dynamically allocated memory, a la: autofree char *data = NULL; ... data = malloc(size); When data goes out of scope, cleanup_free will be called with &data, i.e. cleanup_free(&data), which in turn will call free(3) data. In order to work with all types, e.g. 'char *' (resulting in char ** being passed to cleanup_free) or 'int *' (resulting in int ** being passed to cleanup_free), cleanup_free is defined to work with void *, hence the odd-looking cast: void *target = *(void **) ptr.
43 lines
1.9 KiB
C
43 lines
1.9 KiB
C
/*
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Copyright (c) 2017-2019, Feral Interactive
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Copyright (c) 2019, Red Hat
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All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions are met:
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* Redistributions of source code must retain the above copyright notice,
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this list of conditions and the following disclaimer.
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* Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in the
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documentation and/or other materials provided with the distribution.
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* Neither the name of Feral Interactive nor the names of its contributors
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may be used to endorse or promote products derived from this software
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without specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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POSSIBILITY OF SUCH DAMAGE.
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*/
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#define _GNU_SOURCE
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#include "common-helpers.h"
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/* Starting with C99 we can use "inline" without "static" and thus avoid
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* having multiple (local) definitions of the same inline function. One
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* consequence of that is that if the compiler decides to *not* inline
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* a specific call to the function the linker will expect an definition.
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*/
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extern inline void cleanup_close(int *fd);
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extern inline void cleanup_free(void *ptr);
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