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f2174536a8
Now that that facility is centralised in defs.h, there's no reason to have a special ad-hoc version in sresize and separately comment it.
61 lines
2.0 KiB
C
61 lines
2.0 KiB
C
/*
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* PuTTY memory-handling header.
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*/
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#ifndef PUTTY_PUTTYMEM_H
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#define PUTTY_PUTTYMEM_H
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#include <stddef.h> /* for size_t */
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#include <string.h> /* for memcpy() */
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#include "defs.h"
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#define smalloc(z) safemalloc(z,1)
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#define snmalloc safemalloc
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#define srealloc(y,z) saferealloc(y,z,1)
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#define snrealloc saferealloc
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#define sfree safefree
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void *safemalloc(size_t, size_t);
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void *saferealloc(void *, size_t, size_t);
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void safefree(void *);
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/*
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* Direct use of smalloc within the code should be avoided where
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* possible, in favour of these type-casting macros which ensure you
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* don't mistakenly allocate enough space for one sort of structure
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* and assign it to a different sort of pointer. sresize also uses
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* TYPECHECK to verify that the _input_ pointer is a pointer to the
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* correct type.
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*/
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#define snew(type) ((type *)snmalloc(1, sizeof(type)))
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#define snewn(n, type) ((type *)snmalloc((n), sizeof(type)))
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#define sresize(ptr, n, type) TYPECHECK((type *)0 == (ptr), \
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((type *)snrealloc((ptr), (n), sizeof(type))))
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/*
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* For cases where you want to allocate a struct plus a subsidiary
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* data buffer in one step, this macro lets you add a constant to the
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* amount malloced.
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*
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* Since the return value is already cast to the struct type, a
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* pointer to that many bytes of extra data can be conveniently
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* obtained by simply adding 1 to the returned pointer!
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* snew_plus_get_aux is a handy macro that does that and casts the
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* result to void *, so you can assign it straight to wherever you
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* wanted it.
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*/
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#define snew_plus(type, extra) ((type *)snmalloc(1, sizeof(type) + (extra)))
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#define snew_plus_get_aux(ptr) ((void *)((ptr) + 1))
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/*
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* This function is called by the innermost safemalloc/saferealloc
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* functions when allocation fails. Usually it's provided by misc.c
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* which ties it into an application's existing modalfatalbox()
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* system, but standalone test applications can reimplement it some
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* other way if they prefer.
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*/
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NORETURN void out_of_memory(void);
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#endif
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