Platform: detect system page size

src/util/platform/FFPlatform.h

@@ -22,6 +22,8 @@ typedef struct FFPlatform {
     FFstrbuf systemVersion;
     FFstrbuf systemArchitecture;
     FFstrbuf systemDisplayVersion;
+
+    uint32_t pageSize;
 } FFPlatform;
 
 void ffPlatformInit(FFPlatform* platform);

src/util/platform/FFPlatform_unix.c

@@ -10,6 +10,7 @@
 
 #ifdef __APPLE__
     #include <libproc.h>
+    #include <sys/sysctl.h>
 #elif defined(__FreeBSD__)
     #include <sys/sysctl.h>
 #endif
@@ -153,6 +154,16 @@ static void getUserShell(FFPlatform* platform, const struct passwd* pwd)
     ffStrbufAppendS(&platform->userShell, shell);
 }
 
+static void getPageSize(FFPlatform* platform)
+{
+    #if defined(__FreeBSD__) || defined(__APPLE__)
+    size_t length = sizeof(platform->pageSize);
+    sysctl((int[]){ CTL_HW, HW_PAGESIZE }, 2, &platform->pageSize, &length, NULL, 0);
+    #else
+    platform->pageSize = (uint32_t) sysconf(_SC_PAGESIZE);
+    #endif
+}
+
 void ffPlatformInitImpl(FFPlatform* platform)
 {
     struct passwd* pwd = getpwuid(getuid());
@@ -176,4 +187,6 @@ void ffPlatformInitImpl(FFPlatform* platform)
     ffStrbufAppendS(&platform->systemVersion, uts.version);
     ffStrbufAppendS(&platform->systemArchitecture, uts.machine);
     ffStrbufInit(&platform->systemDisplayVersion);
+
+    getPageSize(platform);
 }

src/util/platform/FFPlatform_windows.c

@@ -183,9 +183,9 @@ static void getSystemReleaseAndVersion(FFPlatform* platform)
     }
 }
 
-static void getSystemArchitecture(FFPlatform* platform)
+static void getSystemArchitectureAndPageSize(FFPlatform* platform)
 {
-    SYSTEM_INFO sysInfo = {0};
+    SYSTEM_INFO sysInfo;
     GetNativeSystemInfo(&sysInfo);
 
     switch(sysInfo.wProcessorArchitecture)
@@ -215,6 +215,8 @@ static void getSystemArchitecture(FFPlatform* platform)
         default:
             break;
     }
+
+    platform->pageSize = sysInfo.dwPageSize;
 }
 
 void ffPlatformInitImpl(FFPlatform* platform)
@@ -230,5 +232,5 @@ void ffPlatformInitImpl(FFPlatform* platform)
     getUserShell(platform);
 
     getSystemReleaseAndVersion(platform);
-    getSystemArchitecture(platform);
+    getSystemArchitectureAndPageSize(platform);
 }