1 files changed, 63 insertions, 0 deletions
diff --git a/sos-code-article6.5/sos/kmalloc.h b/sos-code-article6.5/sos/kmalloc.h
new file mode 100644
index 0000000..3f35b9d
--- /dev/null
+++ b/sos-code-article6.5/sos/kmalloc.h
@@ -0,0 +1,63 @@
+/* Copyright (C) 2004 David Decotigny
+
+   This program is free software; you can redistribute it and/or
+   modify it under the terms of the GNU General Public License
+   as published by the Free Software Foundation; either version 2
+   of the License, or (at your option) any later version.
+   
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+   
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software
+   Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
+   USA. 
+*/
+#ifndef _SOS_KMALLOC_H_
+#define _SOS_KMALLOC_H_
+
+/**
+ * @file kmalloc.h
+ *
+ * Simple malloc-style wrapper to kmem_vmm.h and kmem_slab.h for
+ * "anonymous" objects (ie not associated to any precise slab cache).
+ */
+
+#include <sos/types.h>
+#include <sos/errno.h>
+
+
+/**
+ * Iniatilize the kmalloc subsystem, ie pre-allocate a series of caches.
+ */
+sos_ret_t sos_kmalloc_subsystem_setup(void);
+
+/*
+ * sos_kmalloc flags
+ */
+/** sos_kmalloc() should succeed without blocking, or return NULL */
+#define SOS_KMALLOC_ATOMIC  1
+
+/**
+ * Allocate a kernel object of the given size in the most suited slab
+ * cache if size can be handled by one of the pre-allocated caches, or
+ * using directly the range allocator otherwise. The object will
+ * allways be mapped in physical memory (ie implies
+ * SOS_KSLAB_CREATE_MAP and SOS_KMEM_VMM_MAP).
+ *
+ * @param size  The size of the object
+ * @param flags The allocation flags (SOS_KMALLOC_* flags)
+ */
+sos_vaddr_t sos_kmalloc(sos_size_t size, sos_ui32_t flags);
+
+/**
+ * @note you are perfectly allowed to give the address of the
+ * kernel image, or the address of the bios area here, it will work:
+ * the kernel/bios WILL be "deallocated". But if you really want to do
+ * this, well..., do expect some "surprises" ;)
+ */
+sos_ret_t sos_kfree(sos_vaddr_t vaddr);
+
+#endif /* _SOS_KMALLOC_H_ */