From 38183310be7af6af5ee60e7c9e9647133a7d11c3 Mon Sep 17 00:00:00 2001 From: Paolo Bonzini Date: Wed, 14 May 2014 17:43:21 +0800 Subject: memory: move preallocation code out of exec.c So that backends can use it. Since we need the page size for efficiency, move code to compute it out of translate-all.c and into util/oslib-win32.c. Signed-off-by: Paolo Bonzini Signed-off-by: Hu Tao Reviewed-by: Michael S. Tsirkin Signed-off-by: Michael S. Tsirkin --- util/oslib-win32.c | 19 +++++++++++++++++++ 1 file changed, 19 insertions(+) (limited to 'util/oslib-win32.c') diff --git a/util/oslib-win32.c b/util/oslib-win32.c index 69552f7..ee6bcf1 100644 --- a/util/oslib-win32.c +++ b/util/oslib-win32.c @@ -350,3 +350,22 @@ gint g_poll_fixed(GPollFD *fds, guint nfds, gint timeout) return num_completed; } + +size_t getpagesize(void) +{ + SYSTEM_INFO system_info; + + GetSystemInfo(&system_info); + return system_info.dwPageSize; +} + +void os_mem_prealloc(int fd, char *area, size_t memory) +{ + int i; + size_t pagesize = getpagesize(); + + memory = (memory + pagesize - 1) & -pagesize; + for (i = 0; i < memory / pagesize; i++) { + memset(area + pagesize * i, 0, 1); + } +} -- cgit v1.1