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Full Discussion: Memory Leaks
Top Forums Programming Memory Leaks Post 302721481 by alister on Thursday 25th of October 2012 12:46:22 PM
Old 10-25-2012
Quote:
Originally Posted by Corona688
free() never returns it to the system -- it just puts it in a list so malloc() knows what to recycle next time.
In the open source world, that hasn't been true for about 10 years. Linux (glibc), OpenBSD, NetBSD, and FreeBSD all return memory to the system under certain circumstances (such as free()ing a massive chunk).

I have no idea how the proprietary libcs behave.

The second half of this post about the exact same topic contains excerpts from a couple of malloc/free implementations, with links to their sources: https://www.unix.com/302717047-post9.html

Regards,
Alister
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Mojo::Asset::Memory(3pm)				User Contributed Perl Documentation				  Mojo::Asset::Memory(3pm)

NAME
Mojo::Asset::Memory - In-memory storage for HTTP 1.1 content SYNOPSIS
use Mojo::Asset::Memory; my $mem = Mojo::Asset::Memory->new; $mem->add_chunk('foo bar baz'); say $mem->slurp; DESCRIPTION
Mojo::Asset::Memory is an in-memory storage backend for HTTP 1.1 content. EVENTS
Mojo::Asset::Memory can emit the following events. "upgrade" $mem->on(upgrade => sub { my ($mem, $file) = @_; ... }); Emitted when asset gets upgraded to a Mojo::Asset::File object. $mem->on(upgrade => sub { my ($mem, $file) = @_; $file->tmpdir('/tmp'); }); ATTRIBUTES
Mojo::Asset::Memory inherits all attributes from Mojo::Asset and implements the following new ones. "auto_upgrade" my $upgrade = $mem->auto_upgrade; $mem = $mem->auto_upgrade(1); Try to detect if content size exceeds "max_memory_size" limit and automatically upgrade to a Mojo::Asset::File object. "max_memory_size" my $size = $mem->max_memory_size; $mem = $mem->max_memory_size(1024); Maximum size in bytes of data to keep in memory before automatically upgrading to a Mojo::Asset::File object, defaults to the value of the "MOJO_MAX_MEMORY_SIZE" environment variable or 262144. METHODS
Mojo::Asset::Memory inherits all methods from Mojo::Asset and implements the following new ones. "new" my $mem = Mojo::Asset::Memory->new; Construct a new Mojo::Asset::Memory object. "add_chunk" $mem = $mem->add_chunk('foo bar baz'); my $file = $mem->add_chunk('abc' x 262144); Add chunk of data and upgrade to Mojo::Asset::File object if necessary. "contains" my $position = $mem->contains('bar'); Check if asset contains a specific string. "get_chunk" my $chunk = $mem->get_chunk($offset); Get chunk of data starting from a specific position. "move_to" $mem = $mem->move_to('/home/sri/foo.txt'); Move asset data into a specific file. "size" my $size = $mem->size; Size of asset data in bytes. "slurp" my $string = mem->slurp; Read all asset data at once. SEE ALSO
Mojolicious, Mojolicious::Guides, <http://mojolicio.us>. perl v5.14.2 2012-09-05 Mojo::Asset::Memory(3pm)
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