source/io/handle.cpp

   1 #include <cerrno>
   2 #include <unistd.h>
   3 #include <msp/core/systemerror.h>
   4 #include "handle.h"
   5 #include "handle_private.h"
   6
   7 namespace Msp {
   8 namespace IO {
   9
  10 Handle::Handle():
  11         priv(new Private)
  12 { }
  13
  14 Handle::Handle(const Handle &other):
  15         priv(new Private)
  16 {
  17         priv->handle = other.priv->handle;
  18 }
  19
  20 Handle &Handle::operator=(const Handle &other)
  21 {
  22         priv->handle = other.priv->handle;
  23         return *this;
  24 }
  25
  26 Handle::~Handle()
  27 {
  28         delete priv;
  29 }
  30
  31 Handle::operator const void *() const
  32 {
  33 #ifdef WIN32
  34         return priv->handle!=INVALID_HANDLE_VALUE ? this : 0;
  35 #else
  36         return priv->handle!=-1 ? this : 0;
  37 #endif
  38 }
  39
  40
  41 Handle::Private::Private():
  42 #ifdef WIN32
  43         handle(INVALID_HANDLE_VALUE)
  44 #else
  45         handle(-1)
  46 #endif
  47 { }
  48
  49 Handle::Private &Handle::Private::operator=(H h)
  50 {
  51         handle = h;
  52         return *this;
  53 }
  54
  55
  56 unsigned sys_read(Handle &handle, char *buf, unsigned size)
  57 {
  58 #ifdef WIN32
  59         DWORD ret;
  60         if(ReadFile(*handle, buf, size, &ret, 0)==0)
  61                 throw system_error("ReadFile");
  62 #else
  63         int ret = read(*handle, buf, size);
  64         if(ret==-1)
  65         {
  66                 if(errno==EAGAIN)
  67                         return 0;
  68                 else
  69                         throw system_error("read");
  70         }
  71 #endif
  72
  73         return ret;
  74 }
  75
  76 unsigned sys_write(Handle &handle, const char *buf, unsigned size)
  77 {
  78 #ifdef WIN32
  79         DWORD ret;
  80         if(WriteFile(*handle, buf, size, &ret, 0)==0)
  81                 throw system_error("WriteFile");
  82 #else
  83         int ret = write(*handle, buf, size);
  84         if(ret==-1)
  85         {
  86                 if(errno==EAGAIN)
  87                         return 0;
  88                 else
  89                         throw system_error("write");
  90         }
  91 #endif
  92
  93         return ret;
  94 }
  95
  96 void sys_close(Handle &handle)
  97 {
  98 #ifdef WIN32
  99         CloseHandle(*handle);
 100 #else
 101         close(*handle);
 102 #endif
 103 }
 104
 105 } // namespace IO
 106 } // namespace Msp