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w32: Add implementation of gmtime_r, localtime_r

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Those functions are missing in MinGW.

Some versions of MinGW-w64 include defines for gmtime_r and localtime_r.
Older versions of these macros are buggy (they return a pointer to a
static variable), therefore we don't want them. Newer versions are
similar to the code used here, but without the memset.

The implementation which is used here is not strictly reentrant,
but sufficiently good for QEMU on w32 or w64.

Signed-off-by: Stefan Weil <sw@weilnetz.de>
[blauwirbel@gmail.com: added comment about locking]
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
This commit is contained in:
Stefan Weil 2012-09-22 22:26:19 +02:00 committed by Blue Swirl
parent 93b6599734
commit d3e8f95753
2 changed files with 30 additions and 0 deletions
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24
oslib-win32.c
View File

@ -74,6 +74,30 @@ void qemu_vfree(void *ptr)
VirtualFree(ptr, 0, MEM_RELEASE);
}
/* FIXME: add proper locking */
struct tm *gmtime_r(const time_t *timep, struct tm *result)
{
struct tm *p = gmtime(timep);
memset(result, 0, sizeof(*result));
if (p) {
*result = *p;
p = result;
}
return p;
}
/* FIXME: add proper locking */
struct tm *localtime_r(const time_t *timep, struct tm *result)
{
struct tm *p = localtime(timep);
memset(result, 0, sizeof(*result));
if (p) {
*result = *p;
p = result;
}
return p;
}
void socket_set_block(int fd)
{
unsigned long opt = 0;

6
qemu-os-win32.h
View File

@ -68,6 +68,12 @@
/* Declaration of ffs() is missing in MinGW's strings.h. */
int ffs(int i);
/* Missing POSIX functions. Don't use MinGW-w64 macros. */
#undef gmtime_r
struct tm *gmtime_r(const time_t *timep, struct tm *result);
#undef localtime_r
struct tm *localtime_r(const time_t *timep, struct tm *result);
static inline void os_setup_signal_handling(void) {}
static inline void os_daemonize(void) {}
static inline void os_setup_post(void) {}