Simple IPC with pipes

kernel/proc/proc.h

@@ -6,6 +6,7 @@
 #include "spinlock/spinlock.h"
 #include "bitmap/bitmap.h"
 #include "vfs/vfs.h"
+#include "ipc/pipe/pipe.h"
 
 #define PROC_NAME_MAX 0x100
 
@@ -13,7 +14,9 @@
 #define PROC_STACKSIZE (PROC_STACKBLOCKS * BITMAP_BLOCK_SIZE)
 
 #define PROC_MAX 0x100 // max amount of processes
-#define PROC_VFSHANDLES_MAX 0x80
+
+#define PROC_VFSHANDLES_MAX   0x80
+#define PROC_PIPEHANDLES_MAX  0x20
 
 typedef struct {
   IntrStackFrame trapframe;
@@ -42,6 +45,8 @@ typedef struct Proc {
 
   VfsObj *vobjs[PROC_VFSHANDLES_MAX];
   uint64_t vobjcnt;
+
+  IpcPipe *pipes[PROC_PIPEHANDLES_MAX];
 } Proc;
 
 typedef struct {