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authorDan Albert <danalbert@google.com>2016-02-24 13:48:45 -0800
committerDan Albert <danalbert@google.com>2016-02-24 13:51:18 -0800
commitb9de1157289455b0ca26daff519d4a0ddcd1fa13 (patch)
tree4c56cc0a34b91f17033a40a455f26652304f7b8d /gcc-4.8.3/libiberty/getpagesize.c
parent098157a754787181cfa10e71325832448ddcea98 (diff)
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Update 4.8.1 to 4.8.3.
My previous drop was the wrong version. The platform mingw is currently using 4.8.3, not 4.8.1 (not sure how I got that wrong). From ftp://ftp.gnu.org/gnu/gcc/gcc-4.8.3/gcc-4.8.3.tar.bz2. Bug: http://b/26523949 Change-Id: Id85f1bdcbbaf78c7d0b5a69e74c798a08f341c35
Diffstat (limited to 'gcc-4.8.3/libiberty/getpagesize.c')
-rw-r--r--gcc-4.8.3/libiberty/getpagesize.c90
1 files changed, 90 insertions, 0 deletions
diff --git a/gcc-4.8.3/libiberty/getpagesize.c b/gcc-4.8.3/libiberty/getpagesize.c
new file mode 100644
index 000000000..1c3a26304
--- /dev/null
+++ b/gcc-4.8.3/libiberty/getpagesize.c
@@ -0,0 +1,90 @@
+/* Emulation of getpagesize() for systems that need it. */
+
+/*
+
+@deftypefn Supplemental int getpagesize (void)
+
+Returns the number of bytes in a page of memory. This is the
+granularity of many of the system memory management routines. No
+guarantee is made as to whether or not it is the same as the basic
+memory management hardware page size.
+
+@end deftypefn
+
+BUGS
+
+ Is intended as a reasonable replacement for systems where this
+ is not provided as a system call. The value of 4096 may or may
+ not be correct for the systems where it is returned as the default
+ value.
+
+*/
+
+#ifndef VMS
+
+#include "config.h"
+
+#include <sys/types.h>
+#ifdef HAVE_SYS_PARAM_H
+#include <sys/param.h>
+#endif
+
+#undef GNU_OUR_PAGESIZE
+#if defined (HAVE_SYSCONF) && defined (HAVE_UNISTD_H)
+#include <unistd.h>
+#ifdef _SC_PAGESIZE
+#define GNU_OUR_PAGESIZE sysconf(_SC_PAGESIZE)
+#endif
+#endif
+
+#ifndef GNU_OUR_PAGESIZE
+# ifdef PAGESIZE
+# define GNU_OUR_PAGESIZE PAGESIZE
+# else /* no PAGESIZE */
+# ifdef EXEC_PAGESIZE
+# define GNU_OUR_PAGESIZE EXEC_PAGESIZE
+# else /* no EXEC_PAGESIZE */
+# ifdef NBPG
+# define GNU_OUR_PAGESIZE (NBPG * CLSIZE)
+# ifndef CLSIZE
+# define CLSIZE 1
+# endif /* CLSIZE */
+# else /* no NBPG */
+# ifdef NBPC
+# define GNU_OUR_PAGESIZE NBPC
+# else /* no NBPC */
+# define GNU_OUR_PAGESIZE 4096 /* Just punt and use reasonable value */
+# endif /* NBPC */
+# endif /* NBPG */
+# endif /* EXEC_PAGESIZE */
+# endif /* PAGESIZE */
+#endif /* GNU_OUR_PAGESIZE */
+
+int
+getpagesize (void)
+{
+ return (GNU_OUR_PAGESIZE);
+}
+
+#else /* VMS */
+
+#if 0 /* older distributions of gcc-vms are missing <syidef.h> */
+#include <syidef.h>
+#endif
+#ifndef SYI$_PAGE_SIZE /* VMS V5.4 and earlier didn't have this yet */
+#define SYI$_PAGE_SIZE 4452
+#endif
+extern unsigned long lib$getsyi(const unsigned short *,...);
+
+int getpagesize (void)
+{
+ long pagsiz = 0L;
+ unsigned short itmcod = SYI$_PAGE_SIZE;
+
+ (void) lib$getsyi (&itmcod, (void *) &pagsiz);
+ if (pagsiz == 0L)
+ pagsiz = 512L; /* VAX default */
+ return (int) pagsiz;
+}
+
+#endif /* VMS */