source/io/unix/handle.cpp

   1 #include <cerrno>
   2 #include <unistd.h>
   3 #include <fcntl.h>
   4 #include <msp/core/systemerror.h>
   5 #include "handle.h"
   6 #include "handle_private.h"
   7
   8 namespace Msp {
   9 namespace IO {
  10
  11 void sys_set_blocking(Handle &handle, bool b)
  12 {
  13         int flags = fcntl(*handle, F_GETFL);
  14         fcntl(*handle, F_SETFL, (flags&~O_NONBLOCK)|(b?0:O_NONBLOCK));
  15 }
  16
  17 unsigned sys_read(Handle &handle, char *buf, unsigned size)
  18 {
  19         int ret = read(*handle, buf, size);
  20         if(ret==-1)
  21         {
  22                 if(errno==EAGAIN)
  23                         return 0;
  24                 else
  25                         throw system_error("read");
  26         }
  27
  28         return ret;
  29 }
  30
  31 unsigned sys_write(Handle &handle, const char *buf, unsigned size)
  32 {
  33         int ret = write(*handle, buf, size);
  34         if(ret==-1)
  35         {
  36                 if(errno==EAGAIN)
  37                         return 0;
  38                 else
  39                         throw system_error("write");
  40         }
  41
  42         return ret;
  43 }
  44
  45 void sys_close(Handle &handle)
  46 {
  47         if(handle)
  48         {
  49                 close(*handle);
  50                 *handle = INVALID_HANDLE_VALUE;
  51         }
  52 }
  53
  54 } // namespace IO
  55 } // namespace Msp