Implement getrlimit and setrlimit for MS-Windows

* src/w32heap.c (getrlimit, setrlimit): New functions.
Include w32.h.
* src/emacs.c (main): Use 'rlim_t', not 'long', for values that
should be compatible with 'struct rlimit' members.

* nt/inc/sys/resource.h: New header file.

* nt/mingw-cfg.site (ac_cv_func_getrlimit, ac_cv_func_setrlimit):
Set to "yes".

1 files changed, 51 insertions, 0 deletions

diff --git a/nt/inc/sys/resource.h b/nt/inc/sys/resource.h
new file mode 100644
index 00000000000..dfa0318cb40
--- /dev/null
+++ b/nt/inc/sys/resource.h
@@ -0,0 +1,51 @@
+/* A limited emulation of sys/resource.h.
+
+Copyright (C) 2016 Free Software Foundation, Inc.
+
+This file is part of GNU Emacs.
+
+GNU Emacs 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 3 of the License, or (at
+your option) any later version.
+
+GNU Emacs 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 GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.  */
+
+#ifndef INC_SYS_RESOURCE_H_
+#define INC_SYS_RESOURCE_H_
+
+/* We only support RLIMIT_STACK and RLIMIT_NOFILE for now.  */
+enum rlimit_resource {
+  RLIMIT_STACK = 0,
+#define RLIMIT_STACK RLIMIT_STACK
+
+  RLIMIT_NOFILE = 1,
+#define RLIMIT_NOFILE RLIMIT_NOFILE
+
+  RLIMIT_NLIMITS
+#define RLIMIT_NLIMITS RLIMIT_NLIMITS
+};
+
+typedef enum rlimit_resource rlimit_resource_t;
+
+/* We use a 64-bit data type because some values could potentially be
+   64-bit wide even in 32-bit builds.  */
+typedef long long rlim_t;
+
+#define RLIMIT_INFINITY ((rlim_t) -1)
+
+struct rlimit {
+  rlim_t rlim_cur;	/* current soft limit */
+  rlim_t rlim_max;	/* hard limit */
+};
+
+extern int getrlimit (rlimit_resource_t, struct rlimit *);
+extern int setrlimit (rlimit_resource_t, const struct rlimit *);
+
+#endif	/* INC_SYS_RESOURCE_H_ */