= GIET_VM / User Level Libraries =

This section describes the libraries available for user applications:

 === [wiki:library_stdio Stdio library] ===

This library contains all system calls allowing an application
to access a protected ressource (peripheral register, or protected processor register). 
Each function in this library contains at least one SYSCALL instruction to enter the kernel mode.

=== [wiki:library_stdlib  Stdlib user library] ===

This library contains various utility functions that do not use system calls.

=== [wiki:library_mwmr  MWMR user library] ===

This library defines a communication middleware
supporting channelised communications in a multi-tasks parallel application.
This middleware does not use system calls.

=== [wiki:library_barrier Barrier user library] ===

This library contains functions used to synchronize
severals tasks in a multi-task parallel application. Most of these functions
do not use system calls.

=== [wiki:library_locks  Spin_lock user library] ===

This library contains functions used to provide
exclusive access to a shared ressource in a multi-task parallel application. 
These functions do not use system calls.

=== [wiki:library_malloc  Malloc user library] ===

This library contains functions allowing an user application
to dynamically allocate virtual memory from the application heap.
When the target architecture is clusterized (several physical banks), the heap
is physically distributed on the clusters, and there is actually on allocator per cluster.