Add mutex syscalls

libmsl/alloc/liballoc.c

@@ -4,14 +4,18 @@
 #include <alloc/liballoc.h>
 #include <m/system.h>
 
+#define LIBALLOC_MUTEX 500
+
 static uintptr_t liballoc_map_base = PROC_MAP_BASE;
 static int mem_rid_base = 1000000;
 
-void liballoc_init (void) {}
+void liballoc_init (void) { create_mutex (LIBALLOC_MUTEX, RV_PRIVATE); }
 
-int liballoc_lock (void) { return 0; }
+void liballoc_deinit (void) { unlink_mutex (LIBALLOC_MUTEX, RV_PRIVATE); }
 
-int liballoc_unlock (void) { return 0; }
+int liballoc_lock (void) { return lock_mutex (LIBALLOC_MUTEX, RV_PRIVATE); }
+
+int liballoc_unlock (void) { return unlock_mutex (LIBALLOC_MUTEX, RV_PRIVATE); }
 
 void* liballoc_alloc (int pages, int* mem_rid) {
   uintptr_t current_base = liballoc_map_base;

libmsl/alloc/liballoc.h

@@ -87,6 +87,7 @@ void* calloc (size_t, size_t); //< The standard function.
 void free (void*);             //< The standard function.
 
 void liballoc_init (void);
+void liballoc_deinit (void);
 
 #ifdef __cplusplus
 }

libmsl/init/__premain.c

@@ -17,8 +17,7 @@ static void clear_bss (void) {
 void __premain (void) {
   clear_bss ();
   liballoc_init ();
-
   app_main ();
-
+  liballoc_deinit ();
   quit ();
 }

libmsl/m/system.c

@@ -9,7 +9,7 @@
 
 #define do_syscall(...) do_syscall1 (__VA_ARGS__, 0, 0, 0, 0, 0, 0)
 
-int quit (void) { return do_syscall (SYS_QUIT); }
+int quit (void) { return do_syscall (SYS_QUIT, 0); }
 
 int test (char c) { return do_syscall (SYS_TEST, c); }
 
@@ -30,3 +30,11 @@ int unlink_mem (int mem_rid, int vis, size_t pages) {
 int clone (uintptr_t vstack_top, size_t stack_size, void (*entry) (void)) {
   return do_syscall (SYS_CLONE, vstack_top, stack_size, entry);
 }
+
+int create_mutex (int mutex_rid, int vis) { return do_syscall (SYS_CREATE_MUTEX, mutex_rid, vis); }
+
+int unlink_mutex (int mutex_rid, int vis) { return do_syscall (SYS_UNLINK_MUTEX, mutex_rid, vis); }
+
+int lock_mutex (int mutex_rid, int vis) { return do_syscall (SYS_LOCK_MUTEX, mutex_rid, vis); }
+
+int unlock_mutex (int mutex_rid, int vis) { return do_syscall (SYS_UNLOCK_MUTEX, mutex_rid, vis); }

libmsl/m/system.h

@@ -24,5 +24,9 @@ int unmap (uintptr_t vaddr, size_t pages);
 int create_mem (int mem_rid, int vis, size_t pages);
 int unlink_mem (int mem_rid, int vis, size_t pages);
 int clone (uintptr_t vstack_top, size_t stack_size, void (*entry) (void));
+int create_mutex (int mutex_rid, int vis);
+int unlink_mutex (int mutex_rid, int vis);
+int lock_mutex (int mutex_rid, int vis);
+int unlock_mutex (int mutex_rid, int vis);
 
 #endif // _LIBMSL_M_SYSTEM_H