Basically rewrote the ports subsystem to use:

* its own heap allocator instead of cbuf - this makes cbuf superfluous, and I
  therefore removed it from the kernel. The heap is swappable, so lifts the
  kernel's resource usage a bit. In the future, the heap should grow as well;
  right now it should be at least as good as before.
* it no longer uses spinlocks, but just mutexes now for better scalability - it
  was not usable with interrupts turned off anyway (due to its semaphore usage).
* it no longer uses semaphores, but condition variables.
* Needed to move the port initialization to a later point, as swappable memory
  wasn't usable that early.
* All ports test are still passing, hopefully I didn't mess anything up :-)


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@33728 a95241bf-73f2-0310-859d-f6bbb57e9c96

headers/private/kernel/cbuf.h

@@ -1,50 +0,0 @@
-/*
-** Copyright 2001-2002, Travis Geiselbrecht. All rights reserved.
-** Distributed under the terms of the NewOS License.
-*/
-#ifndef _KERNEL_CBUF_H
-#define _KERNEL_CBUF_H
-
-
-#include <OS.h>
-
-
-typedef struct cbuf cbuf;
-
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-status_t cbuf_init(void);
-cbuf *cbuf_get_chain(size_t len);
-cbuf *cbuf_get_chain_noblock(size_t len);
-void cbuf_free_chain_noblock(cbuf *buf);
-void cbuf_free_chain(cbuf *buf);
-
-size_t cbuf_get_length(cbuf *buf);
-void *cbuf_get_ptr(cbuf *buf, size_t offset);
-bool cbuf_is_contig_region(cbuf *buf, size_t start, size_t end);
-
-status_t cbuf_memcpy_to_chain(cbuf *chain, size_t offset, const void *_src, size_t len);
-status_t cbuf_memcpy_from_chain(void *dest, cbuf *chain, size_t offset, size_t len);
-
-status_t cbuf_user_memcpy_to_chain(cbuf *chain, size_t offset, const void *_src, size_t len);
-status_t cbuf_user_memcpy_from_chain(void *dest, cbuf *chain, size_t offset, size_t len);
-
-uint16 cbuf_ones_cksum16(cbuf *chain, size_t offset, size_t len);
-
-cbuf *cbuf_merge_chains(cbuf *chain1, cbuf *chain2);
-cbuf *cbuf_duplicate_chain(cbuf *chain, size_t offset, size_t len);
-
-status_t cbuf_truncate_head(cbuf *chain, size_t trunc_bytes);
-status_t cbuf_truncate_tail(cbuf *chain, size_t trunc_bytes);
-
-void cbuf_test(void);
-	// ToDo: to be removed...
-
-#ifdef __cplusplus
-}
-#endif
-
-#endif	/* _KERNEL_CBUF_H */