Move most platform-specific code into overlay directories

[libs/core.git] / source / io / pipe.cpp

diff --git a/source/io/pipe.cpp b/source/io/pipe.cpp
index 2975a0635074e981aea9dc909cdef5f872d3ca36..831076f0086b2ffd756ec9e86a3b1b1364e9b1cc 100644 (file)
--- a/source/io/pipe.cpp
+++ b/source/io/pipe.cpp
@@ -1,9 +1,3 @@
-#ifndef WIN32
-#include <fcntl.h>
-#include <errno.h>
-#endif
-#include <msp/core/systemerror.h>
-#include <msp/strings/formatter.h>
 #include "pipe.h"
 
 using namespace std;
@@ -11,74 +5,23 @@ using namespace std;
 namespace Msp {
 namespace IO {
 
-struct Pipe::Private
-{
-#ifdef WIN32
-       OVERLAPPED *overlapped;
-       Handle event;
-       unsigned buf_size;
-       char *buffer;
-       unsigned buf_avail;
-       char *buf_next;
-#endif
-};
-
-
 Pipe::Pipe():
-       priv(0)
+       reader(read_handle, 1024)
 {
-#ifdef WIN32
-       string name = format("\\\\.\\pipe\\%u.%p", GetCurrentProcessId(), this);
-       handle[0] = CreateNamedPipe(name.c_str(), PIPE_ACCESS_INBOUND|FILE_FLAG_OVERLAPPED, PIPE_TYPE_BYTE, 1, 1024, 1024, 0, 0);
-       if(handle[0]==INVALID_HANDLE_VALUE)
-               throw system_error("CreateNamedPipe");
-
-       handle[1] = CreateFile(name.c_str(), GENERIC_WRITE, 0, 0, OPEN_EXISTING, 0, 0);
-       if(handle[1]==INVALID_HANDLE_VALUE)
-       {
-               unsigned err = GetLastError();
-               CloseHandle(handle[0]);
-               throw system_error(format("CreateFile(%s)", name), err);
-       }
-
-       priv = new Private;
-       priv->overlapped = 0;
-       priv->event = CreateEvent(0, true, false, 0);
-       priv->buf_size = 1024;
-       priv->buffer = new char[priv->buf_size];
-       priv->buf_avail = 0;
-       priv->buf_next = priv->buffer;
-#else
-       if(pipe(handle)==-1)
-               throw system_error("pipe");
-#endif
+       mode = M_RDWR;
+
+       platform_init();
 
        set_events(P_INPUT);
 }
 
 Pipe::~Pipe()
-{
-       close();
-#ifdef WIN32
-       CloseHandle(priv->event);
-       delete priv->buffer;
-#endif
-       delete priv;
-}
-
-void Pipe::close()
 {
        set_events(P_NONE);
 
        signal_flush_required.emit();
-#ifdef WIN32
-       CloseHandle(handle[0]);
-       CloseHandle(handle[1]);
-#else
-       ::close(handle[0]);
-       ::close(handle[1]);
-       signal_closed.emit();
-#endif
+       sys_close(read_handle);
+       sys_close(write_handle);
 }
 
 void Pipe::set_block(bool b)
@@ -87,12 +30,8 @@ void Pipe::set_block(bool b)
        if(b)
                mode = (mode|M_NONBLOCK);
 
-#ifndef WIN32
-       int flags = fcntl(handle[0], F_GETFD);
-       fcntl(handle[0], F_SETFL, (flags&O_NONBLOCK)|(b?0:O_NONBLOCK));
-       flags = fcntl(handle[1], F_GETFD);
-       fcntl(handle[1], F_SETFL, (flags&O_NONBLOCK)|(b?0:O_NONBLOCK));
-#endif
+       sys_set_blocking(read_handle, b);
+       sys_set_blocking(write_handle, b);
 }
 
 unsigned Pipe::do_write(const char *buf, unsigned size)
@@ -100,22 +39,7 @@ unsigned Pipe::do_write(const char *buf, unsigned size)
        if(size==0)
                return 0;
 
-#ifdef WIN32
-       DWORD ret;
-       if(!WriteFile(handle[1], buf, size, &ret, 0))
-               throw system_error("WriteFile");
-#else
-       int ret = ::write(handle[1], buf, size);
-       if(ret==-1)
-       {
-               if(errno==EAGAIN)
-                       return 0;
-               else
-                       throw system_error("write");
-       }
-#endif
-
-       return ret;
+       return sys_write(write_handle, buf, size);
 }
 
 unsigned Pipe::do_read(char *buf, unsigned size)
@@ -123,80 +47,21 @@ unsigned Pipe::do_read(char *buf, unsigned size)
        if(size==0)
                return 0;
 
-#ifdef WIN32
-       // Initiate overlapped read if needed
-       get_event_handle();
-
-       if(priv->overlapped)
-       {
-               DWORD ret;
-               if(!GetOverlappedResult(handle[0], priv->overlapped, &ret, !priv->buf_avail))
-                       throw system_error("GetOverlappedResult");
-               else
-               {
-                       priv->buf_avail += ret;
-                       delete priv->overlapped;
-                       priv->overlapped = 0;
-               }
-       }
-
-       unsigned ret = min(priv->buf_avail, size);
-       memcpy(buf, priv->buf_next, ret);
-       priv->buf_next += ret;
-       priv->buf_avail -= ret;
-
-       // Initiate another overlapped read in case someone is polling us
-       get_event_handle();
-#else
-       int ret = ::read(handle[0], buf, size);
-       if(ret==-1)
-       {
-               if(errno==EAGAIN)
-                       return 0;
-               else
-                       throw system_error("read");
-       }
-#endif
-
+       unsigned ret = reader.read(buf, size);
        if(ret==0)
-       {
-               eof_flag = true;
-               signal_end_of_file.emit();
-       }
+               set_eof();
 
        return ret;
 }
 
-Handle Pipe::get_event_handle()
+const Handle &Pipe::get_handle(Mode m)
 {
-#ifdef WIN32
-       if(!priv->overlapped && !priv->buf_avail)
-       {
-               priv->overlapped = new OVERLAPPED;
-               memset(priv->overlapped, 0, sizeof(OVERLAPPED));
-               priv->overlapped->hEvent = priv->event;
-
-               DWORD ret;
-               priv->buf_next = priv->buffer;
-               if(!ReadFile(handle[0], priv->buffer, priv->buf_size, &ret, priv->overlapped))
-               {
-                       unsigned err = GetLastError();
-                       if(err!=ERROR_IO_PENDING)
-                               throw system_error("ReadFile");
-               }
-               else
-               {
-                       priv->buf_avail = ret;
-                       delete priv->overlapped;
-                       priv->overlapped = 0;
-                       SetEvent(priv->event);
-               }
-       }
-
-       return priv->event;
-#else
-       return handle[0];
-#endif
+       if(m==M_READ)
+               return read_handle;
+       else if(m==M_WRITE)
+               return write_handle;
+       else
+               throw invalid_argument("Pipe::get_handle");
 }
 
 } // namespace IO