- SEE ALSO
- COPYRIGHT AND LICENSE
FFI::Platypus::Memory - Memory functions for FFI
use FFI::Platypus::Memory; # allocate 64 bytes of memory using the # libc malloc function. my $pointer = malloc 64; # use that memory wisely ... # free the memory when you are done. free $pointer;
This module provides an interface to common memory functions provided by the standard C library. They may be useful when constructing interfaces to C libraries with FFI. It works mostly with the
opaque type and it is worth reviewing the section on opaque pointers in FFI::Platypus::Type.
my $pointer = calloc $count, $size;
calloc function contiguously allocates enough space for $count objects that are $size bytes of memory each.
free function frees the memory allocated by
strdup. It is important to only free memory that you yourself have allocated. A good way to crash your program is to try and free a pointer that some C library has returned to you.
my $pointer = malloc $size;
malloc function allocates $size bytes of memory.
memcpy $dst_pointer, $src_pointer, $size;
memcpy function copies $size bytes from $src_pointer to $dst_pointer. It also returns $dst_pointer.
memset $buffer, $value, $length;
memset function writes $length bytes of $value to the address specified by $buffer.
my $new_pointer = realloc $old_pointer, $size;
realloc function reallocates enough memory to fit $size bytes. It copies the existing data and frees $old_pointer.
If you pass
undef in as $old_pointer, then it behaves exactly like
my $pointer = realloc undef, 64; # same as malloc 64
strcpy $opaque, $string;
Copies the string to the memory location pointed to by
my $pointer = strdup $string;
strdup function allocates enough memory to contain $string and then copies it to that newly allocated memory. This version of
strdup returns an opaque pointer type, not a string type. This may seem a little strange, but returning a string type would not be very useful in Perl.
my $pointer = strndup $string, $max;
The same as
strdup above, except at most
$max characters will be copied in the new string.
Main Platypus documentation.
Author: Graham Ollis <email@example.com>
Bakkiaraj Murugesan (bakkiaraj)
Dylan Cali (calid)
Zaki Mughal (zmughal)
Fitz Elliott (felliott)
Vickenty Fesunov (vyf)
Gregor Herrmann (gregoa)
Shlomi Fish (shlomif)
Ilya Pavlov (Ilya33)
Petr Písař (ppisar)
Mohammad S Anwar (MANWAR)
Håkon Hægland (hakonhagland, HAKONH)
Meredith (merrilymeredith, MHOWARD)
Diab Jerius (DJERIUS)
Eric Brine (IKEGAMI)
José Joaquín Atria (JJATRIA)
Pete Houston (openstrike, HOUSTON)
This software is copyright (c) 2015,2016,2017,2018,2019,2020 by Graham Ollis.
This is free software; you can redistribute it and/or modify it under the same terms as the Perl 5 programming language system itself.