Add mmap() API

git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@916 42af7a65-404d-4744-a932-0658087f49c3

1 files changed, 108 insertions, 0 deletions

diff --git a/nuttx/include/sys/mman.h b/nuttx/include/sys/mman.h
new file mode 100644
index 000000000..9a140011c
--- /dev/null
+++ b/nuttx/include/sys/mman.h
@@ -0,0 +1,108 @@
+/****************************************************************************
+ * include/sys/mman.h
+ *
+ *   Copyright (C) 2008 Gregory Nutt. All rights reserved.
+ *   Author: Gregory Nutt <spudmonkey@racsa.co.cr>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ * 3. Neither the name NuttX nor the names of its contributors may be
+ *    used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ ****************************************************************************/
+
+#ifndef __SYS_MMAN_H
+#define __SYS_MMAN_H
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+#include <sys/types.h>
+
+/****************************************************************************
+ * Pre-Processor Definitions
+ ****************************************************************************/
+
+/* Protections are chosen from these bits, OR'd together.  NuttX does not
+ * support any of these, but are provided for source level compatibility
+ */
+
+#define PROT_NONE       0x0             /* Page may not be accessed */
+#define PROT_READ       0x1             /* Page may be read */
+#define PROT_WRITE      0x2             /* Page may be written */
+#define PROT_EXEC       0x4             /* Page may be executed */
+
+/* Sharing types -- ignored by NuttX. */
+
+#define MAP_SHARED      0x00001         /* Share this mapping */
+#define MAP_PRIVATE     0x00002         /* Create a private copy-on-write mapping */
+#define MAP_TYPE        0x0000f         /* Mask for type of mapping */
+#define MAP_FIXED       0x00010         /* Map to specified address exactly */
+#define MAP_FILE        0x00000         /* The mapping is backed by a file */
+#define MAP_ANONYMOUS   0x00020         /* The mapping is not backed by any file */
+#define MAP_ANON        MAP_ANONYMOUS
+
+/* These are Linux-specific.  */
+
+#define MAP_GROWSDOWN   0x00100         /* Used to stack allocations */
+#define MAP_DENYWRITE   0x00800         /* Do not permit writes to file */
+#define MAP_EXECUTABLE  0x01000         /* Mark it as an executable */
+#define MAP_LOCKED      0x02000         /* Lock pages mapped into memory */
+#define MAP_NORESERVE   0x04000         /* Do not reserve swap space for this mapping */
+#define MAP_POPULATE    0x08000         /* Populate (prefault) pagetables */
+#define MAP_NONBLOCK    0x10000         /* Do not block on IO */
+
+/* Failure return */
+
+#define MAP_FAILED      ((void*)-1)
+
+/****************************************************************************
+ * Public Type Definitions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Public Function Prototypes
+ ****************************************************************************/
+
+#undef EXTERN
+#if defined(__cplusplus)
+#define EXTERN extern "C"
+extern "C" {
+#else
+#define EXTERN extern
+#endif
+
+EXTERN FAR void *mmap(FAR void *start, size_t length, int prot, int flags,
+                      int fd, off_t offset);
+#define munmap(start, length)
+
+#undef EXTERN
+#if defined(__cplusplus)
+}
+#endif
+
+#endif /* __SYS_MMAN_H */