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Diffstat (limited to 'man3/libsimple_valigned_reallocfn.3')
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1 files changed, 189 insertions, 0 deletions
diff --git a/man3/libsimple_valigned_reallocfn.3 b/man3/libsimple_valigned_reallocfn.3 new file mode 100644 index 0000000..0acf175 --- /dev/null +++ b/man3/libsimple_valigned_reallocfn.3 @@ -0,0 +1,189 @@ +.TH LIBSIMPLE_VALIGNED_REALLOCFN 3 libsimple +.SH NAME +libsimple_valigned_reallocfn \- reallocate memory and customise alignment + +.SH SYNOPSIS +.nf +#include <libsimple.h> + +static inline void *libsimple_valigned_reallocfn(void *\fIptr\fP, size_t \fIalignment\fP, size_t \fIn\fP, va_list \fIap\fP); +static inline void *libsimple_aligned_reallocfn(void *\fIptr\fP, size_t \fIalignment\fP, size_t \fIn\fP, ..., /* (size_t)0 */); + +#ifndef valigned_reallocfn +# define valigned_reallocfn libsimple_valigned_reallocfn +#endif +#ifndef aligned_reallocfn +# define aligned_reallocfn libsimple_aligned_reallocfn +#endif +.fi +.PP +Link with +.IR \-lsimple . + +.SH DESCRIPTION +The +.BR libsimple_aligned_reallocfn () +function reallocates memory allocated on the +heap and return the older pointer or a new +pointer with the alignment of +.I alignment +to the allocated memory of +.I N +bytes, where +.I N +is the product of +.I n +and all following arguments (which should have the type +.BR size_t ) +up to the first 0; +.I n +must not be 0. The returned pointer will contain the +same content as +.IR ptr , +but truncated to +.I N +bytes if it is smaller or with the new bytes +unitialised if it is larger. If a new pointer +is returned, rather than +.IR ptr , +.I ptr +is deallocated; +.I ptr +is also deallocated on failure. The function +.BR free (3) +shall be called with the returned pointer as +input when the allocated memory is no longer needed. +.PP +The +.BR libsimple_valigned_reallocfn () +function is a version of the +.BR libsimple_aligned_reallocfn () +function that use +.B va_list +instead of variadic arguments. + +.SH RETURN VALUE +The +.BR libsimple_valigned_reallocfn () +and +.BR libsimple_aligned_reallocfn (), +functions return a pointer to the allocated memory +upon success completion; otherwise the +.BR libsimple_valigned_reallocfn () +and +.BR libsimple_aligned_reallocfn () +functions return +.B NULL +and set +.I errno +it indicate the error. + +.SH ERRORS +The +.BR libsimple_vreallocn (), +.BR libsimple_reallocn () +function will fail for the reasons specified for the +.BR realloc (3) +function, and if: +.TP +.B EINVAL +.I n +is 0. +.TP +.B EINVAL +.I alignment +is an invalid alignment (usually it needs to be an power of 2). +.TP +.B ENOSYS +The function is not implemented. The function requires +non-standard libc functions, and is therefore not supported +for all libc implementations. + +The function is implemented if and only if the macro +.B LIBSIMPLE_HAVE_ALIGNED_REALLOC +is defined by the library. + +.SH ATTRIBUTES +For an explanation of the terms used in this section, see +.BR attributes (7). +.TS +allbox; +lb lb lb +l l l. +Interface Attribute Value +T{ +.BR libsimple_valigned_reallocfn (), +.br +.BR libsimple_aligned_reallocfn () +T} Thread safety MT-Safe +T{ +.BR libsimple_valigned_reallocfn (), +.br +.BR libsimple_aligned_reallocfn () +T} Async-signal safety AS-Safe +T{ +.BR libsimple_valigned_reallocfn (), +.br +.BR libsimple_aligned_reallocfn () +T} Async-cancel safety AC-Safe +.TE + +.SH EXAMPLES +None. + +.SH APPLICATION USAGE +None. + +.SH RATIONALE +None. + +.SH FUTURE DIRECTIONS +None. + +.SH NOTES +None. + +.SH BUGS +None. + +.SH SEE ALSO +.BR libsimple_enmalloc (3), +.BR libsimple_mallocz (3), +.BR libsimple_vmallocn (3), +.BR libsimple_vmalloczn (3), +.BR libsimple_encalloc (3), +.BR libsimple_vcallocn (3), +.BR libsimple_enrealloc (3), +.BR libsimple_reallocarray (3), +.BR libsimple_vreallocn (3), +.BR libsimple_reallocf (3), +.BR libsimple_reallocarrayf (3), +.BR libsimple_vreallocfn (3), +.BR libsimple_aligned_realloc (3), +.BR libsimple_aligned_reallocarray (3), +.BR libsimple_aligned_vreallocn (3), +.BR libsimple_aligned_reallocf (3), +.BR libsimple_aligned_reallocarrayf (3), +.BR libsimple_memalign (3), +.BR libsimple_memalignz (3), +.BR libsimple_vmemalignn (3), +.BR libsimple_vmemalignzn (3), +.BR libsimple_enposix_memalign (3), +.BR libsimple_posix_memalignz (3), +.BR libsimple_vposix_memalignn (3), +.BR libsimple_vposix_memalignzn (3), +.BR libsimple_enaligned_alloc (3), +.BR libsimple_aligned_allocz (3), +.BR libsimple_valigned_allocn (3), +.BR libsimple_valigned_alloczn (3), +.BR libsimple_pvalloc (3), +.BR libsimple_pvallocz (3), +.BR libsimple_vpvallocn (3), +.BR libsimple_vpvalloczn (3), +.BR libsimple_valloc (3), +.BR libsimple_vallocz (3), +.BR libsimple_vvallocn (3), +.BR libsimple_vvalloczn (3), +.BR libsimple_vmemalloc (3), +.BR libsimple_varrayalloc (3), +.BR malloc (3) |