[newlib-cygwin] Cygwin: remove the OPEN_MAX_MAX macro

[Ken Brown]

https://sourceware.org/git/gitweb.cgi?p=newlib-cygwin.git;h=5b8358e6ed8496f9c4a7cf6ed0fa740c79ff3719

commit 5b8358e6ed8496f9c4a7cf6ed0fa740c79ff3719
Author: Ken Brown <kbrown@cornell.edu>
Date:   Fri Jan 29 09:14:35 2021 -0500

    Cygwin: remove the OPEN_MAX_MAX macro
    
    Replace all occurrences of OPEN_MAX_MAX by OPEN_MAX, and define the
    latter to be 3200, which was the value of the former.  In view of the
    recent change to getdtablesize, there is no longer a need to
    distinguish between these two macros.

Diff:
---
 winsup/cygwin/dtable.cc        | 8 ++++----
 winsup/cygwin/dtable.h         | 2 --
 winsup/cygwin/fcntl.cc         | 2 +-
 winsup/cygwin/include/limits.h | 7 +++----
 winsup/cygwin/resource.cc      | 2 +-
 winsup/cygwin/syscalls.cc      | 8 ++++----
 winsup/cygwin/sysconf.cc       | 2 +-
 7 files changed, 14 insertions(+), 17 deletions(-)

diff --git a/winsup/cygwin/dtable.cc b/winsup/cygwin/dtable.cc
index 9f4210797..ad4b59211 100644
--- a/winsup/cygwin/dtable.cc
+++ b/winsup/cygwin/dtable.cc
@@ -74,10 +74,10 @@ dtable::extend (size_t howmuch, size_t min)
   size_t new_size = size + howmuch;
   fhandler_base **newfds;
 
-  if (new_size <= OPEN_MAX_MAX)
+  if (new_size <= OPEN_MAX)
     /* ok */;
-  else if (size < OPEN_MAX_MAX && min < OPEN_MAX_MAX)
-    new_size = OPEN_MAX_MAX;
+  else if (size < OPEN_MAX && min < OPEN_MAX)
+    new_size = OPEN_MAX;
   else
     {
       set_errno (EMFILE);
@@ -735,7 +735,7 @@ dtable::dup3 (int oldfd, int newfd, int flags)
       set_errno (EBADF);
       goto done;
     }
-  if (newfd >= OPEN_MAX_MAX || newfd < 0)
+  if (newfd >= OPEN_MAX || newfd < 0)
     {
       syscall_printf ("new fd out of bounds: %d", newfd);
       set_errno (EBADF);
diff --git a/winsup/cygwin/dtable.h b/winsup/cygwin/dtable.h
index 0f745a75a..e1a8461b8 100644
--- a/winsup/cygwin/dtable.h
+++ b/winsup/cygwin/dtable.h
@@ -10,8 +10,6 @@ details. */
 
 /* Initial and increment values for cygwin's fd table */
 #define NOFILE_INCR    32
-/* Maximum size we allow expanding to.  */
-#define OPEN_MAX_MAX (100 * NOFILE_INCR)
 
 #include "thread.h"
 #include "sync.h"
diff --git a/winsup/cygwin/fcntl.cc b/winsup/cygwin/fcntl.cc
index 9ef7e521f..507ba61f7 100644
--- a/winsup/cygwin/fcntl.cc
+++ b/winsup/cygwin/fcntl.cc
@@ -57,7 +57,7 @@ fcntl64 (int fd, int cmd, ...)
 	{
 	case F_DUPFD:
 	case F_DUPFD_CLOEXEC:
-	  if (arg >= 0 && arg < OPEN_MAX_MAX)
+	  if (arg >= 0 && arg < OPEN_MAX)
 	    {
 	      int flags = cmd == F_DUPFD_CLOEXEC ? O_CLOEXEC : 0;
 	      res = cygheap->fdtab.dup3 (fd, cygheap_fdnew ((arg) - 1), flags);
diff --git a/winsup/cygwin/include/limits.h b/winsup/cygwin/include/limits.h
index 6a55578f3..497d45419 100644
--- a/winsup/cygwin/include/limits.h
+++ b/winsup/cygwin/include/limits.h
@@ -208,12 +208,11 @@ details. */
 #undef MQ_PRIO_MAX
 #define MQ_PRIO_MAX INT_MAX
 
-/* # of open files per process. Actually it can be more since Cygwin
-   grows the dtable as necessary. We define a reasonable limit here
-   which is returned by getdtablesize(), sysconf(_SC_OPEN_MAX) and
+/* # of open files per process.  This limit is returned by
+   getdtablesize(), sysconf(_SC_OPEN_MAX), and
    getrlimit(RLIMIT_NOFILE). */
 #undef OPEN_MAX
-#define OPEN_MAX 256
+#define OPEN_MAX 3200
 
 /* Size in bytes of a page. */
 #undef PAGESIZE
diff --git a/winsup/cygwin/resource.cc b/winsup/cygwin/resource.cc
index ac56acf8c..97777e9d2 100644
--- a/winsup/cygwin/resource.cc
+++ b/winsup/cygwin/resource.cc
@@ -182,7 +182,7 @@ getrlimit (int resource, struct rlimit *rlp)
 	  __get_rlimit_stack (rlp);
 	  break;
 	case RLIMIT_NOFILE:
-	  rlp->rlim_cur = rlp->rlim_max = OPEN_MAX_MAX;
+	  rlp->rlim_cur = rlp->rlim_max = OPEN_MAX;
 	  break;
 	case RLIMIT_CORE:
 	  rlp->rlim_cur = cygheap->rlim_core;
diff --git a/winsup/cygwin/syscalls.cc b/winsup/cygwin/syscalls.cc
index d293ff2c0..52a020f07 100644
--- a/winsup/cygwin/syscalls.cc
+++ b/winsup/cygwin/syscalls.cc
@@ -143,7 +143,7 @@ extern "C" int
 dup2 (int oldfd, int newfd)
 {
   int res;
-  if (newfd >= OPEN_MAX_MAX || newfd < 0)
+  if (newfd >= OPEN_MAX || newfd < 0)
     {
       set_errno (EBADF);
       res = -1;
@@ -164,7 +164,7 @@ extern "C" int
 dup3 (int oldfd, int newfd, int flags)
 {
   int res;
-  if (newfd >= OPEN_MAX_MAX)
+  if (newfd >= OPEN_MAX)
     {
       set_errno (EBADF);
       res = -1;
@@ -2878,7 +2878,7 @@ setdtablesize (int size)
     }
 
   if (size <= (int) cygheap->fdtab.size
-      || cygheap->fdtab.extend (size - cygheap->fdtab.size, OPEN_MAX_MAX))
+      || cygheap->fdtab.extend (size - cygheap->fdtab.size, OPEN_MAX))
     return 0;
 
   return -1;
@@ -2887,7 +2887,7 @@ setdtablesize (int size)
 extern "C" int
 getdtablesize ()
 {
-  return OPEN_MAX_MAX;
+  return OPEN_MAX;
 }
 
 extern "C" int
diff --git a/winsup/cygwin/sysconf.cc b/winsup/cygwin/sysconf.cc
index d5d82bb4a..70cdb0fbd 100644
--- a/winsup/cygwin/sysconf.cc
+++ b/winsup/cygwin/sysconf.cc
@@ -511,7 +511,7 @@ static struct
   {cons, {c:CHILD_MAX}},		/*   1, _SC_CHILD_MAX */
   {cons, {c:CLOCKS_PER_SEC}},		/*   2, _SC_CLK_TCK */
   {cons, {c:NGROUPS_MAX}},		/*   3, _SC_NGROUPS_MAX */
-  {cons, {c:OPEN_MAX_MAX}},		/*   4, _SC_OPEN_MAX */
+  {cons, {c:OPEN_MAX}},		/*   4, _SC_OPEN_MAX */
   {cons, {c:_POSIX_JOB_CONTROL}},	/*   5, _SC_JOB_CONTROL */
   {cons, {c:_POSIX_SAVED_IDS}},		/*   6, _SC_SAVED_IDS */
   {cons, {c:_POSIX_VERSION}},		/*   7, _SC_VERSION */