Makefile.uk: Rename SUPPRESS_FLAGS to LIBPTHREAD-EMBEDDED_SUPPRESS_FLAGS

Signed-off-by: Costin Lupu <costin.lupu@cs.pub.ro>
Reviewed-by: Felipe Huici <felipe.huici@neclab.eu>

pthread.h: Convert pthread_t to unsigned long

The POSIX standard outlines that pthread_t is an opaque data type and no
assumption should be made about it. However, we observed that libraries and
applications assume frequently that pthread_t is a pointer or other numerical
data type and use it to identify the corresponding threads.

pthread-embedded makes the strange decision to define pthread_t as
structure, a decision that, although compliant with POSIX standards,
makes the porting process a bit challenging. Therefore we introduce a
conversion function which simply returns the first encapsulated
unsigned long value in the structure which actually points to the
underlying thread object.

Signed-off-by: Costin Lupu <costin.lupu@cs.pub.ro>
Reviewed-by: Felipe Huici <felipe.huici@neclab.eu>

Add sched.h header

Add it just to provide cpu_set_t type definition.

Signed-off-by: Costin Lupu <costin.lupu@cs.pub.ro>
Reviewed-by: Felipe Huici <felipe.huici@neclab.eu>

Export semaphore symbols

Signed-off-by: Teodora Serbanescu <teo.serbanescu16@gmail.com>
Reviewed-by: Felipe Huici <felipe.huici@neclab.eu>

Add pthread_atfork() function

For now, Unikraft does not support fork(), so we will just print an
warning saying that.

Signed-off-by: Costin Lupu <costin.lupu@cs.pub.ro>
Reviewed-by: Felipe Huici <felipe.huici@neclab.eu>

Makefile.uk: Restrict pointer-to-int-cast and int-to-pointer-cast warnings only to C

Otherwise we get warnings that these warnings are only C specific.

Signed-off-by: Costin Lupu <costin.lupu@cs.pub.ro>
Reviewed-by: Felipe Huici <felipe.huici@neclab.eu>

patches: Add patch for making pte_handle a C++ structure

The CXX library requires pthe_handle to be defined as a C++ structure. This
patch also adds the overloaded operators needed by the CXX library.

Signed-off-by: Teodora Serbanescu <teo.serbanescu16@gmail.com>
Reviewed-by: Felipe Huici <felipe.huici@neclab.eu>

include/pthread.h: Guard C code for C++

Signed-off-by: Teodora Serbanescu <teo.serbanescu16@gmail.com>
Reviewed-by: Florian Schmidt <florian.schmidt@neclab.eu>

Add missing pthread functions

This patch adds some missing functions for updating threads attributes,
such as the thread name or the stack address and size. Currently we
support only the fixed stack size of 64KB.

These new functions are used by the Ruby interpreter.

Signed-off-by: Costin Lupu <costin.lupu@cs.pub.ro>
Reviewed-by: Florian Schmidt <florian.schmidt@neclab.eu>

Disable atomic functions

We disable the atomic function given that we are using them as macros.

Signed-off-by: Costin Lupu <costin.lupu@cs.pub.ro>
Reviewed-by: Florian Schmidt <florian.schmidt@neclab.eu>

patches: Fix atomic operations

We use atomic operations as macros because pte uses them for both int
and long types.

Signed-off-by: Costin Lupu <costin.lupu@cs.pub.ro>
Reviewed-by: Florian Schmidt <florian.schmidt@neclab.eu>

Initial port of pthread-embedded to Unikraft

This is our initial port of pthread-embedded to Unikraft as external
library. For now you need newlib to make it work. When adding the
library in the dependency list, pthread-embedded should stay before
newlib (e.g. ...:$(UK_LIBS)/pthread-embedded:$(UK_LIBS)/newlib.git:...).

Signed-off-by: Costin Lupu <costin.lupu@cs.pub.ro>
Reviewed-by: Florian Schmidt <florian.schmidt@neclab.eu>

patches: Add patches for proper building of original library

Current patches include bugfixes and refinements in the original code.

Signed-off-by: Costin Lupu <costin.lupu@cs.pub.ro>
Reviewed-by: Florian Schmidt <florian.schmidt@neclab.eu>

Add .gitignore

Signed-off-by: Costin Lupu <costin.lupu@cs.pub.ro>
Reviewed-by: Florian Schmidt <florian.schmidt@neclab.eu>

Add documentation

Signed-off-by: Costin Lupu <costin.lupu@cs.pub.ro>
Reviewed-by: Florian Schmidt <florian.schmidt@neclab.eu>

Initial commit (empty)