scheduler/pipe.c

   1 /*
   2  * Win32 pipes
   3  *
   4  * Copyright 1998 Alexandre Julliard
   5  */
   6
   7 #include <assert.h>
   8 #include "winerror.h"
   9 #include "k32obj.h"
  10 #include "process.h"
  11 #include "thread.h"
  12 #include "heap.h"
  13 #include "server/request.h"
  14 #include "server.h"
  15
  16 typedef struct _PIPE
  17 {
  18     K32OBJ         header;
  19 } PIPE;
  20
  21
  22 /***********************************************************************
  23  *      CreatePipe    (KERNEL32.170)
  24  */
  25 BOOL WINAPI CreatePipe( PHANDLE hReadPipe, PHANDLE hWritePipe,
  26                           LPSECURITY_ATTRIBUTES sa, DWORD size )
  27 {
  28     struct create_pipe_request req;
  29     struct create_pipe_reply reply;
  30     PIPE *read_pipe, *write_pipe;
  31     int len;
  32
  33     req.inherit = (sa && (sa->nLength>=sizeof(*sa)) && sa->bInheritHandle);
  34     CLIENT_SendRequest( REQ_CREATE_PIPE, -1, 1, &req, sizeof(req) );
  35     if (CLIENT_WaitReply( &len, NULL, 1, &reply, sizeof(reply) ) != ERROR_SUCCESS)
  36         return FALSE;
  37
  38     SYSTEM_LOCK();
  39     if (!(read_pipe = (PIPE *)K32OBJ_Create( K32OBJ_PIPE, sizeof(*read_pipe),
  40                                              NULL, reply.handle_read,
  41                                              STANDARD_RIGHTS_REQUIRED|SYNCHRONIZE|GENERIC_READ,
  42                                              sa, hReadPipe )))
  43     {
  44         CLIENT_CloseHandle( reply.handle_write );
  45         /* handle_read already closed by K32OBJ_Create */
  46         SYSTEM_UNLOCK();
  47         return FALSE;
  48     }
  49     K32OBJ_DecCount( &read_pipe->header );
  50     if (!(write_pipe = (PIPE *)K32OBJ_Create( K32OBJ_PIPE, sizeof(*write_pipe),
  51                                               NULL, reply.handle_write,
  52                                               STANDARD_RIGHTS_REQUIRED|SYNCHRONIZE|GENERIC_WRITE,
  53                                               sa, hWritePipe )))
  54     {
  55         CloseHandle( *hReadPipe );
  56         *hReadPipe = INVALID_HANDLE_VALUE;
  57         SYSTEM_UNLOCK();
  58         return FALSE;
  59     }
  60     /* everything OK */
  61     K32OBJ_DecCount( &write_pipe->header );
  62     SetLastError(0); /* FIXME */
  63     SYSTEM_UNLOCK();
  64     return TRUE;
  65 }