LibPthread: Start working on a POSIX threading library

This patch adds pthread_create() and pthread_exit(), which currently
simply wrap our existing create_thread() and exit_thread() syscalls.

LibThread is also ported to using LibPthread.

Libraries/LibC/pthread.h

@@ -1,75 +0,0 @@
-#pragma once
-
-#include <sched.h>
-#include <sys/cdefs.h>
-
-__BEGIN_DECLS
-
-typedef void* pthread_t;
-typedef void* pthread_key_t;
-typedef void* pthread_once_t;
-typedef void* pthread_mutex_t;
-typedef void* pthread_attr_t;
-typedef void* pthread_mutexattr_t;
-typedef void* pthread_cond_t;
-typedef void* pthread_spinlock_t;
-typedef void* pthread_condattr_t;
-
-int pthread_create(pthread_t, pthread_attr_t*, void* (*)(void*), void*);
-void pthread_exit(void*);
-int pthread_kill(pthread_t, int);
-void pthread_cleanup_push(void (*)(void*), void*);
-void pthread_cleanup_pop(int);
-int pthread_join(pthread_t, void**);
-int pthread_mutex_lock(pthread_mutex_t*);
-int pthread_mutex_trylock(pthread_mutex_t* mutex);
-int pthread_mutex_unlock(pthread_mutex_t*);
-int pthread_mutex_init(pthread_mutex_t*, const pthread_mutexattr_t*);
-int pthread_mutex_destroy(pthread_mutex_t*);
-int pthread_attr_init(pthread_attr_t*);
-int pthread_attr_destroy(pthread_attr_t*);
-
-int pthread_once(pthread_once_t*, void (*)(void));
-#define PTHREAD_ONCE_INIT 0
-pthread_once_t once_control = PTHREAD_ONCE_INIT;
-void* pthread_getspecific(pthread_key_t key);
-int pthread_setspecific(pthread_key_t key, const void* value);
-
-#define PTHREAD_MUTEX_NORMAL 0
-#define PTHREAD_MUTEX_RECURSIVE 1
-#define PTHREAD_MUTEX_INITIALIZER 0
-#define PTHREAD_COND_INITIALIZER 0
-
-int pthread_key_create(pthread_key_t* key, void (*destructor)(void*));
-int pthread_key_delete(pthread_key_t key);
-int pthread_cond_broadcast(pthread_cond_t*);
-int pthread_cond_init(pthread_cond_t*, const pthread_condattr_t*);
-int pthread_cond_signal(pthread_cond_t*);
-int pthread_cond_wait(pthread_cond_t*, pthread_mutex_t*);
-int pthread_condattr_destroy(pthread_condattr_t*);
-int pthread_cancel(pthread_t);
-void pthread_cleanup_push(void (*)(void*), void*);
-void pthread_cleanup_pop(int);
-int pthread_cond_broadcast(pthread_cond_t*);
-int pthread_cond_destroy(pthread_cond_t*);
-int pthread_cond_timedwait(pthread_cond_t*, pthread_mutex_t*, const struct timespec*);
-int pthread_cond_wait(pthread_cond_t*, pthread_mutex_t*);
-int pthread_condattr_destroy(pthread_condattr_t*);
-
-void pthread_testcancel(void);
-
-int pthread_spin_destroy(pthread_spinlock_t*);
-int pthread_spin_init(pthread_spinlock_t*, int);
-int pthread_spin_lock(pthread_spinlock_t*);
-int pthread_spin_trylock(pthread_spinlock_t*);
-int pthread_spin_unlock(pthread_spinlock_t*);
-int pthread_cond_destroy(pthread_cond_t*);
-pthread_t pthread_self(void);
-int pthread_detach(pthread_t);
-int pthread_equal(pthread_t, pthread_t);
-void pthread_exit(void*);
-int pthread_mutexattr_init(pthread_mutexattr_t*);
-int pthread_mutexattr_settype(pthread_mutexattr_t*, int);
-int pthread_mutexattr_destroy(pthread_mutexattr_t*);
-
-__END_DECLS

Libraries/LibC/unistd.cpp

@@ -1,5 +1,5 @@
-#include <AK/String.h>
 #include <AK/ScopedValueRollback.h>
+#include <AK/String.h>
 #include <AK/Vector.h>
 #include <Kernel/Syscall.h>
 #include <assert.h>
@@ -540,13 +540,13 @@ char* getlogin()
     return nullptr;
 }
 
-int create_thread(int (*entry)(void*), void* argument)
+int create_thread(void *(*entry)(void*), void* argument)
 {
     int rc = syscall(SC_create_thread, entry, argument);
     __RETURN_WITH_ERRNO(rc, rc, -1);
 }
 
-void exit_thread(int code)
+void exit_thread(void* code)
 {
     syscall(SC_exit_thread, code);
     ASSERT_NOT_REACHED();
@@ -633,5 +633,4 @@ int get_process_name(char* buffer, int buffer_size)
     int rc = syscall(SC_get_process_name, buffer, buffer_size);
     __RETURN_WITH_ERRNO(rc, rc, -1);
 }
-
 }

Libraries/LibC/unistd.h

@@ -36,8 +36,8 @@ void sysbeep();
 int systrace(pid_t);
 int gettid();
 int donate(int tid);
-int create_thread(int (*)(void*), void*);
-void exit_thread(int);
+int create_thread(void *(*)(void*), void* argument);
+void exit_thread(void*);
 int create_shared_buffer(int, void** buffer);
 int share_buffer_with(int, pid_t peer_pid);
 int share_buffer_globally(int);