oslib-win32.c

   1 /*
   2  * os-win32.c
   3  *
   4  * Copyright (c) 2003-2008 Fabrice Bellard
   5  * Copyright (c) 2010 Red Hat, Inc.
   6  *
   7  * QEMU library functions for win32 which are shared between QEMU and
   8  * the QEMU tools.
   9  *
  10  * Permission is hereby granted, free of charge, to any person obtaining a copy
  11  * of this software and associated documentation files (the "Software"), to deal
  12  * in the Software without restriction, including without limitation the rights
  13  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  14  * copies of the Software, and to permit persons to whom the Software is
  15  * furnished to do so, subject to the following conditions:
  16  *
  17  * The above copyright notice and this permission notice shall be included in
  18  * all copies or substantial portions of the Software.
  19  *
  20  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  21  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  22  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
  23  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  24  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  25  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  26  * THE SOFTWARE.
  27  */
  28 #include <windows.h>
  29 #include "config-host.h"
  30 #include "sysemu.h"
  31 #include "trace.h"
  32 #include "qemu_socket.h"
  33
  34 void *qemu_oom_check(void *ptr)
  35 {
  36     if (ptr == NULL) {
  37         fprintf(stderr, "Failed to allocate memory: %lu\n", GetLastError());
  38         abort();
  39     }
  40     return ptr;
  41 }
  42
  43 void *qemu_memalign(size_t alignment, size_t size)
  44 {
  45     void *ptr;
  46
  47     if (!size) {
  48         abort();
  49     }
  50     ptr = qemu_oom_check(VirtualAlloc(NULL, size, MEM_COMMIT, PAGE_READWRITE));
  51     trace_qemu_memalign(alignment, size, ptr);
  52     return ptr;
  53 }
  54
  55 void *qemu_vmalloc(size_t size)
  56 {
  57     void *ptr;
  58
  59     /* FIXME: this is not exactly optimal solution since VirtualAlloc
  60        has 64Kb granularity, but at least it guarantees us that the
  61        memory is page aligned. */
  62     if (!size) {
  63         abort();
  64     }
  65     ptr = qemu_oom_check(VirtualAlloc(NULL, size, MEM_COMMIT, PAGE_READWRITE));
  66     trace_qemu_vmalloc(size, ptr);
  67     return ptr;
  68 }
  69
  70 void qemu_vfree(void *ptr)
  71 {
  72     trace_qemu_vfree(ptr);
  73     VirtualFree(ptr, 0, MEM_RELEASE);
  74 }
  75
  76 void socket_set_nonblock(int fd)
  77 {
  78     unsigned long opt = 1;
  79     ioctlsocket(fd, FIONBIO, &opt);
  80 }
  81
  82 int inet_aton(const char *cp, struct in_addr *ia)
  83 {
  84     uint32_t addr = inet_addr(cp);
  85     if (addr == 0xffffffff) {
  86         return 0;
  87     }
  88     ia->s_addr = addr;
  89     return 1;
  90 }
  91
  92 void qemu_set_cloexec(int fd)
  93 {
  94 }
  95
  96 /* mingw32 needs ffs for compilations without optimization. */
  97 int ffs(int i)
  98 {
  99     /* Use gcc's builtin ffs. */
 100     return __builtin_ffs(i);
 101 }
 102
 103 /* Offset between 1/1/1601 and 1/1/1970 in 100 nanosec units */
 104 #define _W32_FT_OFFSET (116444736000000000ULL)
 105
 106 int qemu_gettimeofday(qemu_timeval *tp)
 107 {
 108   union {
 109     unsigned long long ns100; /*time since 1 Jan 1601 in 100ns units */
 110     FILETIME ft;
 111   }  _now;
 112
 113   if(tp) {
 114       GetSystemTimeAsFileTime (&_now.ft);
 115       tp->tv_usec=(long)((_now.ns100 / 10ULL) % 1000000ULL );
 116       tp->tv_sec= (long)((_now.ns100 - _W32_FT_OFFSET) / 10000000ULL);
 117   }
 118   /* Always return 0 as per Open Group Base Specifications Issue 6.
 119      Do not set errno on error.  */
 120   return 0;
 121 }