include/sysemu/os-posix.h

   1 /*
   2  * posix specific declarations
   3  *
   4  * Copyright (c) 2003-2008 Fabrice Bellard
   5  * Copyright (c) 2010 Jes Sorensen <Jes.Sorensen@redhat.com>
   6  *
   7  * Permission is hereby granted, free of charge, to any person obtaining a copy
   8  * of this software and associated documentation files (the "Software"), to deal
   9  * in the Software without restriction, including without limitation the rights
  10  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  11  * copies of the Software, and to permit persons to whom the Software is
  12  * furnished to do so, subject to the following conditions:
  13  *
  14  * The above copyright notice and this permission notice shall be included in
  15  * all copies or substantial portions of the Software.
  16  *
  17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  18  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  19  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
  20  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  21  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  22  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  23  * THE SOFTWARE.
  24  */
  25
  26 #ifndef QEMU_OS_POSIX_H
  27 #define QEMU_OS_POSIX_H
  28
  29 #include <sys/mman.h>
  30 #include <sys/socket.h>
  31 #include <netinet/in.h>
  32 #include <netinet/tcp.h>
  33 #include <arpa/inet.h>
  34 #include <netdb.h>
  35 #include <sys/un.h>
  36
  37 void os_set_line_buffering(void);
  38 void os_set_proc_name(const char *s);
  39 void os_setup_signal_handling(void);
  40 void os_daemonize(void);
  41 void os_setup_post(void);
  42 int os_mlock(void);
  43
  44 #define closesocket(s) close(s)
  45 #define ioctlsocket(s, r, v) ioctl(s, r, v)
  46
  47 typedef struct timeval qemu_timeval;
  48 #define qemu_gettimeofday(tp) gettimeofday(tp, NULL)
  49
  50 #ifndef CONFIG_UTIMENSAT
  51 #ifndef UTIME_NOW
  52 # define UTIME_NOW     ((1l << 30) - 1l)
  53 #endif
  54 #ifndef UTIME_OMIT
  55 # define UTIME_OMIT    ((1l << 30) - 2l)
  56 #endif
  57 #endif
  58 typedef struct timespec qemu_timespec;
  59 int qemu_utimens(const char *path, const qemu_timespec *times);
  60
  61 bool is_daemonized(void);
  62
  63 /**
  64  * qemu_alloc_stack:
  65  * @sz: pointer to a size_t holding the requested usable stack size
  66  *
  67  * Allocate memory that can be used as a stack, for instance for
  68  * coroutines. If the memory cannot be allocated, this function
  69  * will abort (like g_malloc()). This function also inserts an
  70  * additional guard page to catch a potential stack overflow.
  71  * Note that the memory required for the guard page and alignment
  72  * and minimal stack size restrictions will increase the value of sz.
  73  *
  74  * The allocated stack must be freed with qemu_free_stack().
  75  *
  76  * Returns: pointer to (the lowest address of) the stack memory.
  77  */
  78 void *qemu_alloc_stack(size_t *sz);
  79
  80 /**
  81  * qemu_free_stack:
  82  * @stack: stack to free
  83  * @sz: size of stack in bytes
  84  *
  85  * Free a stack allocated via qemu_alloc_stack(). Note that sz must
  86  * be exactly the adjusted stack size returned by qemu_alloc_stack.
  87  */
  88 void qemu_free_stack(void *stack, size_t sz);
  89
  90 /* POSIX and Mingw32 differ in the name of the stdio lock functions.  */
  91
  92 static inline void qemu_flockfile(FILE *f)
  93 {
  94     flockfile(f);
  95 }
  96
  97 static inline void qemu_funlockfile(FILE *f)
  98 {
  99     funlockfile(f);
 100 }
 101
 102 #endif