[incubator-nuttx] branch master updated: sysconf: add _SC_PAGESIZE sysconf support

[xiaoxiang]

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xiaoxiang pushed a commit to branch master
in repository https://gitbox.apache.org/repos/asf/incubator-nuttx.git


The following commit(s) were added to refs/heads/master by this push:
     new fd94a32  sysconf: add _SC_PAGESIZE sysconf support
fd94a32 is described below

commit fd94a32468ea7652382d5717b18118fcab08dba3
Author: liuhaitao <liuhai...@xiaomi.com>
AuthorDate: Mon Aug 31 16:58:26 2020 +0800

    sysconf: add _SC_PAGESIZE sysconf support
    
    Also implement getpagesize() based on sysconf(_SC_PAGESIZE).
    
    Change-Id: I812eb8f34ed602f7bc12c4cafafcebc0d98fd136
    Signed-off-by: liuhaitao <liuhai...@xiaomi.com>
---
 include/unistd.h               | 1 +
 libs/libc/unistd/lib_sysconf.c | 7 +++++++
 2 files changed, 8 insertions(+)

diff --git a/include/unistd.h b/include/unistd.h
index 0f132f4..c4460eb 100644
--- a/include/unistd.h
+++ b/include/unistd.h
@@ -274,6 +274,7 @@
 #define link(p1, p2)                     symlink((p1), (p2))
 #define fdatasync(f)                     fsync(f)
 #define getdtablesize(f)                 ((int)sysconf(_SC_OPEN_MAX))
+#define getpagesize(f)                   ((int)sysconf(_SC_PAGESIZE))
 
 /****************************************************************************
  * Public Data
diff --git a/libs/libc/unistd/lib_sysconf.c b/libs/libc/unistd/lib_sysconf.c
index 6da2394..0c3b613 100644
--- a/libs/libc/unistd/lib_sysconf.c
+++ b/libs/libc/unistd/lib_sysconf.c
@@ -241,6 +241,13 @@ long sysconf(int name)
         return 1;
 #endif
 
+      case _SC_PAGESIZE:
+#ifdef CONFIG_MM_PGSIZE
+        return CONFIG_MM_PGSIZE;
+#else
+        return 1;
+#endif
+
       default:
 #if 0 /* Assume valid but not implemented for the time being */
         errcode = EINVAL;