Use a bit allocator for the allocation management of thread contexts,
instead of holding allocation information within the Thread_base objects,
which lead to race conditions in the past.
Moreover, extend the Thread_base class interface with the ability to
to add additional stacks to a thread, and associate the context they're
located in with the corresponding Thread_base object. Additional stacks
can be used to do user-level scheduling with stack switching, without breaking
Genode's API.
Fixes#1024Fixes#1036
Change the template parameter for Bit_allocator, and Bit_array. Instead of
assigning words to be used by the bit array, you can now tell the count of
items that shall be used.
Moreover, some dead code, previously using the Bit_allocator, was removed.
Related to #1024
Splitting the new Genode::Deallocator interface from the former
Genode::Allocator interface enables us to restrict the accessible
operations for code that is only supposed to release memory, but not
perform any allocations.
Additionally, this patch introduces variants of the 'new' operator
that takes a reference (as opposed to a pointer) to a Genode::Allocator
as argument.
By assigning the file name as label, we may become able to remove the
filename argument in the future by just interpreting the last part of
the label as filename. By keeping only the label, we won't need to
consider conditional routing (via <if-arg>) based on session arguments
other than the label anymore.
The previously used RAM 0x0..0x10000000 was just an alias for
0x70000000..0x80000000. Qemu provides up to of 768 MB RAM with the
correct -m argument. This RAM is located at 0x70000000..0x90000000 and
0x20000000..0x30000000. At least the noux_tool_chain scripts are
happy to have that much RAM.
ref #964
The new 'String' buffer type is meant to replace the manually created
character buffers that are scattered throughout Genode. It plainly holds
a null-terminated string to be stored as a member variable (e.g., a
session label) or passed as RPC argument. It is not intended to become a
string API.
This patch adds support for iterating through a const list. This allows
users of lists to be more rigid with regard to constness. Furthermore,
the patch adds the function 'List::insert_at' for inserting an element
at a specified position. By adding this function, we can remove code
duplication in nitpicker.
