From 7cd967f812ab741c41c416fb9f7c2a921c36e947 Mon Sep 17 00:00:00 2001
From: panikon <panikon@zoho.com>
Date: Tue, 8 Jul 2014 23:19:49 -0300
Subject: Extracted method to obtain SYSTEM_INFO from functions in sysinfo.c
 Added proper method to obtain page size in windows

---
 src/common/sysinfo.c | 53 +++++++++++++++++++++++++++++++++++++---------------
 src/common/sysinfo.h |  1 +
 src/common/thread.c  |  5 ++---
 3 files changed, 41 insertions(+), 18 deletions(-)

diff --git a/src/common/sysinfo.c b/src/common/sysinfo.c
index 40ef6cfc0..5ecb7b5ad 100644
--- a/src/common/sysinfo.c
+++ b/src/common/sysinfo.c
@@ -607,6 +607,37 @@ void sysinfo_osversion_retrieve(void) {
 }
 
 typedef void (WINAPI *PGNSI)(LPSYSTEM_INFO);
+
+/**
+ * Retrieves SYSTEM_INFO (Windows only)
+ * System info is not stored anywhere after retrieval
+ * @see http://msdn.microsoft.com/en-us/library/windows/desktop/ms724958(v=vs.85).aspx
+ **/
+void sysinfo_systeminfo_retrieve( LPSYSTEM_INFO info ) {
+	PGNSI pGNSI;
+
+	// Call GetNativeSystemInfo if supported or GetSystemInfo otherwise.
+	pGNSI = (PGNSI) GetProcAddress(GetModuleHandle(TEXT("kernel32.dll")), "GetNativeSystemInfo");
+	if (NULL != pGNSI)
+		pGNSI(info);
+	else
+		GetSystemInfo(info);
+
+	return;
+}
+
+/**
+ * Returns number of bytes in a memory page
+ * Only needed when compiling with MSVC
+ **/
+long sysinfo_getpagesize( void ) {
+	SYSTEM_INFO si;
+	ZeroMemory(&si, sizeof(SYSTEM_INFO));
+
+	sysinfo_systeminfo_retrieve(&si);
+	return si.dwPageSize;
+}
+
 /**
  * Retrieves the CPU type (Windows only).
  *
@@ -615,7 +646,6 @@ typedef void (WINAPI *PGNSI)(LPSYSTEM_INFO);
  */
 void sysinfo_cpu_retrieve(void) {
 	StringBuf buf;
-	PGNSI pGNSI;
 	SYSTEM_INFO si;
 	ZeroMemory(&si, sizeof(SYSTEM_INFO));
 	StrBuf->Init(&buf);
@@ -625,12 +655,7 @@ void sysinfo_cpu_retrieve(void) {
 		sysinfo->p->cpu = NULL;
 	}
 
-	// Call GetNativeSystemInfo if supported or GetSystemInfo otherwise.
-	pGNSI = (PGNSI) GetProcAddress(GetModuleHandle(TEXT("kernel32.dll")), "GetNativeSystemInfo");
-	if (NULL != pGNSI)
-		pGNSI(&si);
-	else
-		GetSystemInfo(&si);
+	sysinfo_systeminfo_retrieve(&si);
 
 	if (si.wProcessorArchitecture == PROCESSOR_ARCHITECTURE_INTEL
 	 || si.wProcessorArchitecture == PROCESSOR_ARCHITECTURE_AMD64
@@ -656,7 +681,6 @@ void sysinfo_cpu_retrieve(void) {
  * Once retrieved, the name is stored into sysinfo->p->arch.
  */
 void sysinfo_arch_retrieve(void) {
-	PGNSI pGNSI;
 	SYSTEM_INFO si;
 	ZeroMemory(&si, sizeof(SYSTEM_INFO));
 
@@ -665,12 +689,7 @@ void sysinfo_arch_retrieve(void) {
 		sysinfo->p->arch = NULL;
 	}
 
-	// Call GetNativeSystemInfo if supported or GetSystemInfo otherwise.
-	pGNSI = (PGNSI) GetProcAddress(GetModuleHandle(TEXT("kernel32.dll")), "GetNativeSystemInfo");
-	if (NULL != pGNSI)
-		pGNSI(&si);
-	else
-		GetSystemInfo(&si);
+	sysinfo_systeminfo_retrieve(&si);
 
 	if (si.wProcessorArchitecture == PROCESSOR_ARCHITECTURE_AMD64) // x64
 		sysinfo->p->arch = aStrdup("x86_64");
@@ -1018,7 +1037,11 @@ void sysinfo_defaults(void) {
 	sysinfo = &sysinfo_s;
 	memset(&sysinfo_p, '\0', sizeof(sysinfo_p));
 	sysinfo->p = &sysinfo_p;
-
+#if defined(WIN32) && !defined(__CYGWIN__)
+	sysinfo->getpagesize = sysinfo_getpagesize;
+#else
+	sysinfo->getpagesize = getpagesize();
+#endif
 	sysinfo->platform = sysinfo_platform;
 	sysinfo->osversion = sysinfo_osversion;
 	sysinfo->cpu = sysinfo_cpu;
diff --git a/src/common/sysinfo.h b/src/common/sysinfo.h
index c0c4d276a..97f14d0f2 100644
--- a/src/common/sysinfo.h
+++ b/src/common/sysinfo.h
@@ -21,6 +21,7 @@ struct sysinfo_private;
 struct sysinfo_interface {
 	struct sysinfo_private *p;
 
+	long (*getpagesize) (void);
 	const char *(*platform) (void);
 	const char *(*osversion) (void);
 	const char *(*cpu) (void);
diff --git a/src/common/thread.c b/src/common/thread.c
index 4be37d576..933ee2c0e 100644
--- a/src/common/thread.c
+++ b/src/common/thread.c
@@ -10,13 +10,13 @@
 
 #include "thread.h"
 
+#include "../common/sysinfo.h" // sysinfo->getpagesize()
 #include "../common/cbasetypes.h"
 #include "../common/malloc.h"
 #include "../common/showmsg.h"
 
 #ifdef WIN32
 #	include "../common/winapi.h"
-#	define getpagesize() 4096 // @TODO: implement this properly (GetSystemInfo .. dwPageSize..). (Atm as on all supported win platforms its 4k its static.)
 #	define __thread __declspec( thread )
 #else
 #	include <pthread.h>
@@ -32,7 +32,6 @@
 #define HAS_TLS
 #endif
 
-
 #define RA_THREADS_MAX 64
 
 struct rAthread {
@@ -170,7 +169,7 @@ rAthread rathread_createEx( rAthreadProc entryPoint,  void *param,  size_t szSta
 
 
 	// given stacksize aligned to systems pagesize?
-	tmp = szStack % getpagesize();
+	tmp = szStack % sysinfo->getpagesize();
 	if(tmp != 0)
 		szStack += tmp;
 
-- 
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