It is a corner case, but a thread may not know if the CPU has
been already claimed before checking the availability.
This way, DLB_NOUPDT is returned to note that the CPU is still "Lent".

Some compiler optimizations may cache dereferenciations appearing
in expr. The memory fence ensures that the references are loaded again
from memory on each iteration.

GTree is a self-balanced binary tree

* Iterate per numver of objects instead of siblings
* Ignore empty objects

There are no MPI tests left. Ignore bind flags detection.

In some systems, file /sys/devices/system/node/node*/cpulist may be
empty. In those cases, DLB needs to ignore the node.

Commit 48f7b689 introduced
unconditional thread rebinding but it was causing also to move
some threads without necessity.

Close #96

Those functions only need system size and they will become a
requirement for mu_init, therefore we avoid circular dependencies.

Now --verbose options affect all libraries, not only debug.
Additionally, some debug macros have been transformed to functions.

Old versions of GCC are too strict with shadowing rules

This binary is used to run applications that may or not be DLB aware,
but will register the current mask before the application starts.

Close #95

This service is used to pre-register a mask into the DLB shared memory

If the shmem exists but we don't have its handler, try to open it
in order to destroy it correctly

Add shmem functions to check if the file exists,
and to destroy it if we don't have access to its handler

Now all C tests will automatically include
assert_noshmem.h and perish.h