X-Git-Url: http://git.tuebingen.mpg.de/?a=blobdiff_plain;f=fd.c;h=30623d1b321b8dfed84b07c33034fc20e05dd351;hb=6e7e1ff218c4328f57f7f7816b2eeabb22790bd7;hp=637884b4b895a9279c5c928ea4028dbddb1a74c7;hpb=dc3bbfa529d9eb9151fdc4119983e8bdf23f751d;p=paraslash.git

diff --git a/fd.c b/fd.c
index 637884b4..30623d1b 100644
--- a/fd.c
+++ b/fd.c
@@ -19,7 +19,7 @@
 /** \file fd.c helper functions for file descriptor handling */
 
 #include "para.h"
-
+#include <sys/mman.h>
 #include <fcntl.h>
 #include <sys/select.h>
 
@@ -183,3 +183,26 @@ int para_fseek(FILE *stream, long offset, int whence)
 	int ret = fseek(stream, offset, whence);
 	return ret < 0? -E_FSEEK : 1;
 }
+
+/**
+ * *paraslash's wrapper for mmap
+ *
+ * \param length number of bytes to mmap
+ * \param prot either PROT_NONE or the bitwise OR of one or more of
+ * PROT_EXEC PROT_READ PROT_WRITE
+ * \param flags exactly one of MAP_SHARED and MAP_PRIVATE
+ * \param fd the file to mmap from
+ * \param offset mmap start
+ *
+ * \return This function either returns a valid pointer to the mapped area
+ * or calls exit() on errors.
+ */
+void *para_mmap(size_t length, int prot, int flags, int fd, off_t offset)
+{
+	void *ret = mmap(NULL, length, prot, flags, fd, offset);
+	if (ret != MAP_FAILED)
+		return ret;
+	PARA_EMERG_LOG("mmap failed: %s", strerror(errno));
+	exit(EXIT_FAILURE);
+}
+