Cache PAGE_SIZE

man:sysconf(3) states:
    The values obtained from these functions are system configuration constants.
    They do not change during the lifetime of a process.

1 files changed, 7 insertions, 0 deletions

diff --git a/CRT.c b/CRT.c
index d3afd0ec..f6321f4c 100644
--- a/CRT.c
+++ b/CRT.c
@@ -544,6 +544,9 @@ const char* CRT_termType;
 
 int CRT_colorScheme = 0;
 
+long CRT_pageSize = -1;
+long CRT_pageSizeKB = -1;
+
 ATTR_NORETURN
 static void CRT_handleSIGTERM(int sgn) {
    (void) sgn;
@@ -675,6 +678,10 @@ void CRT_init(int delay, int colorScheme, bool allowUnicode) {
    mousemask(BUTTON1_RELEASED, NULL);
 #endif
 
+   CRT_pageSize = sysconf(_SC_PAGESIZE);
+   if (CRT_pageSize == -1)
+      CRT_fatalError("Fatal error: Can not get PAGE_SIZE by sysconf(_SC_PAGESIZE)");
+   CRT_pageSizeKB = CRT_pageSize / 1024;
 }
 
 void CRT_done() {