This is the new apr_shm_t API. It completely replaces the old shared

memory API, which was unusable on Win32 and other platforms that do
not have inherited shared memory segments since it only supported
anonymous memory. We now support both anonymous and name-based
shared memory.

Anonymous shmem tested to work on the following platforms:
Linux 2.2, Linux 2.4, Solaris 8, FreeBSD 5.0-CURRENT

Name-based shmem is _not_ fully functional on UNIX, but this API
replaces all of the preexisting apr_shmem_t functionality.

Stubs were provided for Beos and OS/2, and as much relevant code
as possible was preserved, but no guarantees of correctness.

Reviewed by:	Justin Erenkrantz, Will Rowe


git-svn-id: http://svn.apache.org/repos/asf/apr/apr/trunk@62735 13f79535-47bb-0310-9956-ffa450edef68

1 files changed, 128 insertions, 0 deletions

diff --git a/shmem/beos/shm.c b/shmem/beos/shm.c
new file mode 100644
index 000000000..a73d36206
--- /dev/null
+++ b/shmem/beos/shm.c
@@ -0,0 +1,128 @@
+/* ====================================================================
+ * The Apache Software License, Version 1.1
+ *
+ * Copyright (c) 2000-2001 The Apache Software Foundation.  All rights
+ * reserved.
+ *
+ * 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. The end-user documentation included with the redistribution,
+ *    if any, must include the following acknowledgment:
+ *       "This product includes software developed by the
+ *        Apache Software Foundation (http://www.apache.org/)."
+ *    Alternately, this acknowledgment may appear in the software itself,
+ *    if and wherever such third-party acknowledgments normally appear.
+ *
+ * 4. The names "Apache" and "Apache Software Foundation" must
+ *    not be used to endorse or promote products derived from this
+ *    software without prior written permission. For written
+ *    permission, please contact apache@apache.org.
+ *
+ * 5. Products derived from this software may not be called "Apache",
+ *    nor may "Apache" appear in their name, without prior written
+ *    permission of the Apache Software Foundation.
+ *
+ * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED 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 APACHE SOFTWARE FOUNDATION OR
+ * ITS 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.
+ * ====================================================================
+ *
+ * This software consists of voluntary contributions made by many
+ * individuals on behalf of the Apache Software Foundation.  For more
+ * information on the Apache Software Foundation, please see
+ * <http://www.apache.org/>.
+ */
+
+#include "apr_general.h"
+#include "apr_shmem.h"
+#include "apr_errno.h"
+#include "apr_lib.h"
+#include "apr_strings.h"
+#include <stdio.h>
+#include <stdlib.h>
+#include <kernel/OS.h>
+
+struct apr_shm_t {
+    apr_pool_t *p;
+    void *memblock;
+    void *ptr;
+    apr_size_t avail;
+    area_id aid;
+};
+
+APR_DECLARE(apr_status_t) apr_shm_init(apr_shmem_t **m, apr_size_t reqsize, const char *file, 
+                                       apr_pool_t *p)
+{
+    apr_size_t pagesize;
+    area_id newid;
+    char *addr;
+
+    (*m) = (apr_shmem_t *)apr_pcalloc(p, sizeof(apr_shmem_t));
+    /* we MUST allocate in pages, so calculate how big an area we need... */
+    pagesize = ((reqsize + B_PAGE_SIZE - 1) / B_PAGE_SIZE) * B_PAGE_SIZE;
+    
+    newid = create_area("apr_shm", (void*)&addr, B_ANY_ADDRESS,
+                        pagesize, B_CONTIGUOUS, B_READ_AREA|B_WRITE_AREA);
+
+    if (newid < 0)
+        return errno;
+
+    (*m)->p = p;
+    (*m)->aid = newid;
+    (*m)->memblock = addr;
+    (*m)->ptr = (void*)addr;
+    (*m)->avail = pagesize; /* record how big an area we actually created... */
+
+    return APR_SUCCESS;
+}
+
+APR_DECLARE(apr_status_t) apr_shm_destroy(apr_shmem_t *m)
+{
+    delete_area(m->aid);
+    m->avail = 0;
+    m->memblock = NULL;
+    return APR_SUCCESS;
+}
+
+
+APR_DECLARE(apr_status_t) apr_shm_attach(apr_shmem_t **m,
+                                         const char *filename,
+                                         apr_pool_t *pool)
+{
+    return APR_ENOTIMPL;
+}
+
+APR_DECLARE(apr_status_t) apr_shm_detach(apr_shmem_t *m)
+{
+    return APR_ENOTIMPL;
+}
+
+APR_DECLARE(void *) apr_shm_baseaddr_get(const apr_shm_t *m)
+{
+    return APR_ENOTIMPL;
+}
+
+APR_DECLARE(apr_size_t) apr_shm_size_get(const apr_shm_t *m)
+{
+    return APR_ENOTIMPL;
+}
+