Copy the KDE 3.5 branch to branches/trinity for new KDE 3.5 features.

BUG:215923


git-svn-id: svn://anonsvn.kde.org/home/kde/branches/trinity/kdepim@1054174 283d02a7-25f6-0310-bc7c-ecb5cbfe19da

1 files changed, 1152 insertions, 0 deletions

diff --git a/libkdenetwork/libgpgme-copy/gpgme/w32-io.c b/libkdenetwork/libgpgme-copy/gpgme/w32-io.c
new file mode 100644
index 000000000..fd53a6fbc
--- /dev/null
+++ b/libkdenetwork/libgpgme-copy/gpgme/w32-io.c
@@ -0,0 +1,1152 @@
+/* w32-io.c - W32 API I/O functions.
+   Copyright (C) 2000 Werner Koch (dd9jn)
+   Copyright (C) 2001, 2002, 2003, 2004 g10 Code GmbH
+
+   This file is part of GPGME.
+ 
+   GPGME is free software; you can redistribute it and/or modify it
+   under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of
+   the License, or (at your option) any later version.
+   
+   GPGME is distributed in the hope that it will be useful, but
+   WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+   
+   You should have received a copy of the GNU Lesser General Public
+   License along with this program; if not, write to the Free Software
+   Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
+   02111-1307, USA.  */
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <assert.h>
+#include <errno.h>
+#include <signal.h>
+#include <fcntl.h>
+#include <sys/time.h>
+#include <sys/types.h>
+#include <windows.h>
+#include <io.h>
+
+#include "util.h"
+#include "sema.h"
+#include "priv-io.h"
+#include "debug.h"
+
+/* We assume that a HANDLE can be represented by an int which should
+   be true for all i386 systems (HANDLE is defined as void *) and
+   these are the only systems for which Windows is available.  Further
+   we assume that -1 denotes an invalid handle.  */
+
+#define fd_to_handle(a)  ((HANDLE)(a))
+#define handle_to_fd(a)  ((int)(a))
+#define pid_to_handle(a) ((HANDLE)(a))
+#define handle_to_pid(a) ((int)(a))
+
+#define READBUF_SIZE 4096
+#define WRITEBUF_SIZE 4096
+#define PIPEBUF_SIZE  4096
+#define MAX_READERS 20
+#define MAX_WRITERS 20
+
+static struct {
+    int inuse;
+    int fd;
+    void (*handler)(int,void*);
+    void *value;
+} notify_table[256];
+DEFINE_STATIC_LOCK (notify_table_lock);
+
+
+struct reader_context_s {
+    HANDLE file_hd;
+    HANDLE thread_hd;	
+    DECLARE_LOCK (mutex);
+
+    int stop_me;
+    int eof;
+    int eof_shortcut;
+    int error;
+    int error_code;
+
+    HANDLE have_data_ev;  /* manually reset */
+    HANDLE have_space_ev; /* auto reset */
+    HANDLE stopped;
+    size_t readpos, writepos;
+    char buffer[READBUF_SIZE];
+};
+
+
+static struct {
+    volatile int used;
+    int fd;
+    struct reader_context_s *context;
+} reader_table[MAX_READERS];
+static int reader_table_size= MAX_READERS;
+DEFINE_STATIC_LOCK (reader_table_lock);
+
+
+struct writer_context_s {
+    HANDLE file_hd;
+    HANDLE thread_hd;	
+    DECLARE_LOCK (mutex);
+
+    int stop_me;
+    int error;
+    int error_code;
+
+    HANDLE have_data;  /* manually reset */
+    HANDLE is_empty;
+    HANDLE stopped;
+    size_t nbytes; 
+    char buffer[WRITEBUF_SIZE];
+};
+
+
+static struct {
+    volatile int used;
+    int fd;
+    struct writer_context_s *context;
+} writer_table[MAX_WRITERS];
+static int writer_table_size= MAX_WRITERS;
+DEFINE_STATIC_LOCK (writer_table_lock);
+
+
+
+static int
+get_desired_thread_priority (void)
+{
+  int value;
+
+  if (!_gpgme_get_conf_int ("IOThreadPriority", &value))
+    {
+      value = THREAD_PRIORITY_HIGHEST;
+      DEBUG1 ("** Using standard IOThreadPriority of %d\n", value);
+    }
+  else
+    DEBUG1 ("** Configured IOThreadPriority is %d\n", value);
+
+  return value;
+}
+
+
+static HANDLE
+set_synchronize (HANDLE h)
+{
+    HANDLE tmp;
+    
+    /* For NT we have to set the sync flag.  It seems that the only
+     * way to do it is by duplicating the handle.  Tsss.. */
+    if (!DuplicateHandle( GetCurrentProcess(), h,
+                          GetCurrentProcess(), &tmp,
+                          EVENT_MODIFY_STATE|SYNCHRONIZE, FALSE, 0 ) ) {
+        DEBUG1 ("** Set SYNCRONIZE failed: ec=%d\n", (int)GetLastError());
+    }
+    else {
+        CloseHandle (h);
+        h = tmp;
+    }
+    return h;
+}
+
+
+
+static DWORD CALLBACK 
+reader (void *arg)
+{
+    struct reader_context_s *c = arg;
+    int nbytes;
+    DWORD nread;
+
+    DEBUG2 ("reader thread %p for file %p started", c->thread_hd, c->file_hd );
+    for (;;) {
+        LOCK (c->mutex);
+        /* leave a 1 byte gap so that we can see whether it is empty or full*/
+        if ((c->writepos + 1) % READBUF_SIZE == c->readpos) { 
+            /* wait for space */
+            if (!ResetEvent (c->have_space_ev) )
+                DEBUG1 ("ResetEvent failed: ec=%d", (int)GetLastError ());
+            UNLOCK (c->mutex);
+            DEBUG1 ("reader thread %p: waiting for space ...", c->thread_hd );
+            WaitForSingleObject (c->have_space_ev, INFINITE);
+            DEBUG1 ("reader thread %p: got space", c->thread_hd );
+            LOCK (c->mutex);
+       	}
+        if ( c->stop_me ) {
+            UNLOCK (c->mutex);
+            break;
+        }
+        nbytes = (c->readpos + READBUF_SIZE - c->writepos-1) % READBUF_SIZE;
+        if ( nbytes > READBUF_SIZE - c->writepos )
+            nbytes = READBUF_SIZE - c->writepos;
+        UNLOCK (c->mutex);
+
+        DEBUG2 ("reader thread %p: reading %d bytes", c->thread_hd, nbytes );
+        if ( !ReadFile ( c->file_hd,
+                         c->buffer+c->writepos, nbytes, &nread, NULL) ) {
+            c->error_code = (int)GetLastError ();
+            if (c->error_code == ERROR_BROKEN_PIPE ) {
+                c->eof=1;
+                DEBUG1 ("reader thread %p: got eof (broken pipe)",
+                        c->thread_hd );
+            }
+            else {
+                c->error = 1;
+                DEBUG2 ("reader thread %p: read error: ec=%d",
+                        c->thread_hd, c->error_code );
+            }
+            break;
+        }
+        if ( !nread ) {
+            c->eof = 1;
+            DEBUG1 ("reader thread %p: got eof", c->thread_hd );
+            break;
+        }
+        DEBUG2 ("reader thread %p: got %d bytes", c->thread_hd, (int)nread );
+      
+        LOCK (c->mutex);
+        if (c->stop_me) {
+            UNLOCK (c->mutex);
+            break;
+        }
+        c->writepos = (c->writepos + nread) % READBUF_SIZE;
+        if ( !SetEvent (c->have_data_ev) )
+            DEBUG1 ("SetEvent failed: ec=%d", (int)GetLastError ());
+        UNLOCK (c->mutex);
+    }
+    /* indicate that we have an error or eof */
+    if ( !SetEvent (c->have_data_ev) )
+        DEBUG1 ("SetEvent failed: ec=%d", (int)GetLastError ());
+    DEBUG1 ("reader thread %p ended", c->thread_hd );
+    SetEvent (c->stopped);
+
+    return 0;
+}
+
+
+static struct reader_context_s *
+create_reader (HANDLE fd)
+{
+    struct reader_context_s *c;
+    SECURITY_ATTRIBUTES sec_attr;
+    DWORD tid;
+
+    DEBUG1 ("creating new read thread for file handle %p", fd );
+    memset (&sec_attr, 0, sizeof sec_attr );
+    sec_attr.nLength = sizeof sec_attr;
+    sec_attr.bInheritHandle = FALSE;
+
+    c = calloc (1, sizeof *c );
+    if (!c)
+        return NULL;
+
+    c->file_hd = fd;
+    c->have_data_ev = CreateEvent (&sec_attr, TRUE, FALSE, NULL);
+    c->have_space_ev = CreateEvent (&sec_attr, FALSE, TRUE, NULL);
+    c->stopped = CreateEvent (&sec_attr, TRUE, FALSE, NULL);
+    if (!c->have_data_ev || !c->have_space_ev || !c->stopped ) {
+        DEBUG1 ("** CreateEvent failed: ec=%d\n", (int)GetLastError ());
+        if (c->have_data_ev)
+            CloseHandle (c->have_data_ev);
+        if (c->have_space_ev)
+            CloseHandle (c->have_space_ev);
+        if (c->stopped)
+            CloseHandle (c->stopped);
+        free (c);
+        return NULL;
+    }
+
+    c->have_data_ev = set_synchronize (c->have_data_ev);
+    INIT_LOCK (c->mutex);
+
+    c->thread_hd = CreateThread (&sec_attr, 0, reader, c, 0, &tid );
+    if (!c->thread_hd) {
+        DEBUG1 ("** failed to create reader thread: ec=%d\n",
+                 (int)GetLastError ());
+        DESTROY_LOCK (c->mutex);
+        if (c->have_data_ev)
+            CloseHandle (c->have_data_ev);
+        if (c->have_space_ev)
+            CloseHandle (c->have_space_ev);
+        if (c->stopped)
+            CloseHandle (c->stopped);
+        free (c);
+        return NULL;
+    }    
+    else {
+      /* We set the priority of the thread higher because we know that
+         it only runs for a short time.  This greatly helps to increase
+         the performance of the I/O. */
+      SetThreadPriority (c->thread_hd, get_desired_thread_priority ());
+    }
+
+    return c;
+}
+
+static void
+destroy_reader (struct reader_context_s *c)
+{
+    LOCK (c->mutex);
+    c->stop_me = 1;
+    if (c->have_space_ev) 
+        SetEvent (c->have_space_ev);
+    UNLOCK (c->mutex);
+
+    DEBUG1 ("waiting for thread %p termination ...", c->thread_hd );
+    WaitForSingleObject (c->stopped, INFINITE);
+    DEBUG1 ("thread %p has terminated", c->thread_hd );
+    
+    if (c->stopped)
+        CloseHandle (c->stopped);
+    if (c->have_data_ev)
+        CloseHandle (c->have_data_ev);
+    if (c->have_space_ev)
+        CloseHandle (c->have_space_ev);
+    CloseHandle (c->thread_hd);
+    DESTROY_LOCK (c->mutex);
+    free (c);
+}
+
+
+/* 
+ * Find a reader context or create a new one 
+ * Note that the reader context will last until a io_close.
+ */
+static struct reader_context_s *
+find_reader (int fd, int start_it)
+{
+    int i;
+
+    for (i=0; i < reader_table_size ; i++ ) {
+        if ( reader_table[i].used && reader_table[i].fd == fd )
+            return reader_table[i].context;
+    }
+    if (!start_it)
+        return NULL;
+
+    LOCK (reader_table_lock);
+    for (i=0; i < reader_table_size; i++ ) {
+        if (!reader_table[i].used) {
+            reader_table[i].fd = fd;
+            reader_table[i].context = create_reader (fd_to_handle (fd));
+            reader_table[i].used = 1;
+            UNLOCK (reader_table_lock);
+            return reader_table[i].context;
+        }
+    }
+    UNLOCK (reader_table_lock);
+    return NULL;
+}
+
+
+static void
+kill_reader (int fd)
+{
+    int i;
+
+    LOCK (reader_table_lock);
+    for (i=0; i < reader_table_size; i++ ) {
+        if (reader_table[i].used && reader_table[i].fd == fd ) {
+            destroy_reader (reader_table[i].context);
+            reader_table[i].context = NULL;
+            reader_table[i].used = 0;
+            break;
+        }
+    }
+    UNLOCK (reader_table_lock);
+}
+
+
+
+int
+_gpgme_io_read ( int fd, void *buffer, size_t count )
+{
+    int nread;
+    struct reader_context_s *c = find_reader (fd,1);
+
+    DEBUG2 ("fd %d: about to read %d bytes\n", fd, (int)count );
+    if ( !c ) {
+        DEBUG0 ( "no reader thread\n");
+        return -1;
+    }
+    if (c->eof_shortcut) {
+        DEBUG1 ("fd %d: EOF (again)", fd );
+        return 0;
+    }
+
+    LOCK (c->mutex);
+    if (c->readpos == c->writepos && !c->error) { /*no data avail*/
+        UNLOCK (c->mutex);
+        DEBUG2 ("fd %d: waiting for data from thread %p", fd, c->thread_hd);
+        WaitForSingleObject (c->have_data_ev, INFINITE);
+        DEBUG2 ("fd %d: data from thread %p available", fd, c->thread_hd);
+        LOCK (c->mutex);
+    }
+    
+    if (c->readpos == c->writepos || c->error) {
+        UNLOCK (c->mutex);
+        c->eof_shortcut = 1;
+        if (c->eof) {
+            DEBUG1 ("fd %d: EOF", fd );
+            return 0;
+        }
+        if (!c->error) {
+            DEBUG1 ("fd %d: EOF but eof flag not set", fd );
+            return 0;
+        }
+        DEBUG1 ("fd %d: read error", fd );
+        return -1;
+    }
+      
+    nread = c->readpos < c->writepos? c->writepos - c->readpos
+                                    : READBUF_SIZE - c->readpos;
+    if (nread > count)
+        nread = count;
+    memcpy (buffer, c->buffer+c->readpos, nread);
+    c->readpos = (c->readpos + nread) % READBUF_SIZE;
+    if (c->readpos == c->writepos && !c->eof) {
+        if ( !ResetEvent (c->have_data_ev) )
+            DEBUG1 ("ResetEvent failed: ec=%d", (int)GetLastError ());
+    }
+    if (!SetEvent (c->have_space_ev))
+        DEBUG1 ("SetEvent failed: ec=%d", (int)GetLastError ());
+    UNLOCK (c->mutex);
+
+    DEBUG2 ("fd %d: got %d bytes\n", fd, nread );
+    if (nread > 0)
+      _gpgme_debug (2, "fd %d: got `%.*s'\n", fd, nread, buffer);
+
+    return nread;
+}
+/*
+ * The writer does use a simple buffering strategy so that we are
+ * informed about write errors as soon as possible (i.e. with the the
+ * next call to the write function
+ */
+static DWORD CALLBACK 
+writer (void *arg)
+{
+    struct writer_context_s *c = arg;
+    DWORD nwritten;
+
+    DEBUG2 ("writer thread %p for file %p started", c->thread_hd, c->file_hd );
+    for (;;) {
+        LOCK (c->mutex);
+        if ( c->stop_me ) {
+            UNLOCK (c->mutex);
+            break;
+        }
+        if ( !c->nbytes ) { 
+            if (!SetEvent (c->is_empty))
+                DEBUG1 ("SetEvent failed: ec=%d", (int)GetLastError ());
+            if (!ResetEvent (c->have_data) )
+                DEBUG1 ("ResetEvent failed: ec=%d", (int)GetLastError ());
+            UNLOCK (c->mutex);
+            DEBUG1 ("writer thread %p: idle ...", c->thread_hd );
+            WaitForSingleObject (c->have_data, INFINITE);
+            DEBUG1 ("writer thread %p: got data to send", c->thread_hd );
+            LOCK (c->mutex);
+       	}
+        if ( c->stop_me ) {
+            UNLOCK (c->mutex);
+            break;
+        }
+        UNLOCK (c->mutex);
+
+        DEBUG2 ("writer thread %p: writing %d bytes",
+                c->thread_hd, c->nbytes );
+        if ( c->nbytes && !WriteFile ( c->file_hd,  c->buffer, c->nbytes,
+                                       &nwritten, NULL)) {
+            c->error_code = (int)GetLastError ();
+            c->error = 1;
+            DEBUG2 ("writer thread %p: write error: ec=%d",
+                    c->thread_hd, c->error_code );
+            break;
+        }
+        DEBUG2 ("writer thread %p: wrote %d bytes",
+                c->thread_hd, (int)nwritten );
+      
+        LOCK (c->mutex);
+        c->nbytes -= nwritten;
+        UNLOCK (c->mutex);
+    }
+    /* indicate that we have an error  */
+    if ( !SetEvent (c->is_empty) )
+        DEBUG1 ("SetEvent failed: ec=%d", (int)GetLastError ());
+    DEBUG1 ("writer thread %p ended", c->thread_hd );
+    SetEvent (c->stopped);
+
+    return 0;
+}
+
+
+static struct writer_context_s *
+create_writer (HANDLE fd)
+{
+    struct writer_context_s *c;
+    SECURITY_ATTRIBUTES sec_attr;
+    DWORD tid;
+
+    DEBUG1 ("creating new write thread for file handle %p", fd );
+    memset (&sec_attr, 0, sizeof sec_attr );
+    sec_attr.nLength = sizeof sec_attr;
+    sec_attr.bInheritHandle = FALSE;
+
+    c = calloc (1, sizeof *c );
+    if (!c)
+        return NULL;
+
+    c->file_hd = fd;
+    c->have_data = CreateEvent (&sec_attr, TRUE, FALSE, NULL);
+    c->is_empty  = CreateEvent (&sec_attr, TRUE, TRUE, NULL);
+    c->stopped = CreateEvent (&sec_attr, TRUE, FALSE, NULL);
+    if (!c->have_data || !c->is_empty || !c->stopped ) {
+        DEBUG1 ("** CreateEvent failed: ec=%d\n", (int)GetLastError ());
+        if (c->have_data)
+            CloseHandle (c->have_data);
+        if (c->is_empty)
+            CloseHandle (c->is_empty);
+        if (c->stopped)
+            CloseHandle (c->stopped);
+        free (c);
+        return NULL;
+    }
+
+    c->is_empty = set_synchronize (c->is_empty);
+    INIT_LOCK (c->mutex);
+
+    c->thread_hd = CreateThread (&sec_attr, 0, writer, c, 0, &tid );
+    if (!c->thread_hd) {
+        DEBUG1 ("** failed to create writer thread: ec=%d\n",
+                 (int)GetLastError ());
+        DESTROY_LOCK (c->mutex);
+        if (c->have_data)
+            CloseHandle (c->have_data);
+        if (c->is_empty)
+            CloseHandle (c->is_empty);
+        if (c->stopped)
+            CloseHandle (c->stopped);
+        free (c);
+        return NULL;
+    }    
+    else {
+      /* We set the priority of the thread higher because we know that
+         it only runs for a short time.  This greatly helps to increase
+         the performance of the I/O. */
+      SetThreadPriority (c->thread_hd, get_desired_thread_priority ());
+    }
+
+    return c;
+}
+
+static void
+destroy_writer (struct writer_context_s *c)
+{
+    LOCK (c->mutex);
+    c->stop_me = 1;
+    if (c->have_data) 
+        SetEvent (c->have_data);
+    UNLOCK (c->mutex);
+
+    DEBUG1 ("waiting for thread %p termination ...", c->thread_hd );
+    WaitForSingleObject (c->stopped, INFINITE);
+    DEBUG1 ("thread %p has terminated", c->thread_hd );
+    
+    if (c->stopped)
+        CloseHandle (c->stopped);
+    if (c->have_data)
+        CloseHandle (c->have_data);
+    if (c->is_empty)
+        CloseHandle (c->is_empty);
+    CloseHandle (c->thread_hd);
+    DESTROY_LOCK (c->mutex);
+    free (c);
+}
+
+
+/* 
+ * Find a writer context or create a new one 
+ * Note that the writer context will last until a io_close.
+ */
+static struct writer_context_s *
+find_writer (int fd, int start_it)
+{
+    int i;
+
+    for (i=0; i < writer_table_size ; i++ ) {
+        if ( writer_table[i].used && writer_table[i].fd == fd )
+            return writer_table[i].context;
+    }
+    if (!start_it)
+        return NULL;
+
+    LOCK (writer_table_lock);
+    for (i=0; i < writer_table_size; i++ ) {
+        if (!writer_table[i].used) {
+            writer_table[i].fd = fd;
+            writer_table[i].context = create_writer (fd_to_handle (fd));
+            writer_table[i].used = 1;
+            UNLOCK (writer_table_lock);
+            return writer_table[i].context;
+        }
+    }
+    UNLOCK (writer_table_lock);
+    return NULL;
+}
+
+
+static void
+kill_writer (int fd)
+{
+    int i;
+
+    LOCK (writer_table_lock);
+    for (i=0; i < writer_table_size; i++ ) {
+        if (writer_table[i].used && writer_table[i].fd == fd ) {
+            destroy_writer (writer_table[i].context);
+            writer_table[i].context = NULL;
+            writer_table[i].used = 0;
+            break;
+        }
+    }
+    UNLOCK (writer_table_lock);
+}
+
+
+
+
+int
+_gpgme_io_write ( int fd, const void *buffer, size_t count )
+{
+    struct writer_context_s *c = find_writer (fd,1);
+
+    DEBUG2 ("fd %d: about to write %d bytes\n", fd, (int)count );
+    _gpgme_debug (2, "fd %d: write `%.*s'\n", fd, (int) count, buffer);
+    if ( !c ) {
+        DEBUG0 ( "no writer thread\n");
+        return -1;
+    }
+
+    LOCK (c->mutex);
+    if ( c->nbytes ) { /* bytes are pending for send */
+        /* Reset the is_empty event.  Better safe than sorry.  */
+        if (!ResetEvent (c->is_empty))
+            DEBUG1 ("ResetEvent failed: ec=%d", (int)GetLastError ());
+        UNLOCK (c->mutex);
+        DEBUG2 ("fd %d: waiting for empty buffer in thread %p",
+                fd, c->thread_hd);
+        WaitForSingleObject (c->is_empty, INFINITE);
+        DEBUG2 ("fd %d: thread %p buffer is empty", fd, c->thread_hd);
+        LOCK (c->mutex);
+    }
+    
+    if ( c->error) {
+        UNLOCK (c->mutex);
+        DEBUG1 ("fd %d: write error", fd );
+        return -1;
+    }
+
+    /* If no error occured, the number of bytes in the buffer must be
+       zero.  */
+    assert (!c->nbytes);
+
+    if (count > WRITEBUF_SIZE)
+        count = WRITEBUF_SIZE;
+    memcpy (c->buffer, buffer, count);
+    c->nbytes = count;
+
+    /* We have to reset the is_empty event early, because it is also
+       used by the select() implementation to probe the channel.  */
+    if (!ResetEvent (c->is_empty))
+        DEBUG1 ("ResetEvent failed: ec=%d", (int)GetLastError ());
+    if (!SetEvent (c->have_data))
+        DEBUG1 ("SetEvent failed: ec=%d", (int)GetLastError ());
+    UNLOCK (c->mutex);
+
+    DEBUG2 ("fd %d:         copied %d bytes\n",
+                   fd, (int)count );
+    return (int)count;
+}
+
+
+int
+_gpgme_io_pipe ( int filedes[2], int inherit_idx )
+{
+    HANDLE r, w;
+    SECURITY_ATTRIBUTES sec_attr;
+
+    memset (&sec_attr, 0, sizeof sec_attr );
+    sec_attr.nLength = sizeof sec_attr;
+    sec_attr.bInheritHandle = FALSE;
+    
+    if (!CreatePipe ( &r, &w, &sec_attr, PIPEBUF_SIZE))
+        return -1;
+    /* Make one end inheritable. */
+    if ( inherit_idx == 0 ) {
+        HANDLE h;
+        if (!DuplicateHandle( GetCurrentProcess(), r,
+                              GetCurrentProcess(), &h, 0,
+                              TRUE, DUPLICATE_SAME_ACCESS ) ) {
+            DEBUG1 ("DuplicateHandle failed: ec=%d\n", (int)GetLastError());
+            CloseHandle (r);
+            CloseHandle (w);
+            return -1;
+        }
+        CloseHandle (r);
+        r = h;
+    }
+    else if ( inherit_idx == 1 ) {
+        HANDLE h;
+        if (!DuplicateHandle( GetCurrentProcess(), w,
+                              GetCurrentProcess(), &h, 0,
+                              TRUE, DUPLICATE_SAME_ACCESS ) ) {
+            DEBUG1 ("DuplicateHandle failed: ec=%d\n", (int)GetLastError());
+            CloseHandle (r);
+            CloseHandle (w);
+            return -1;
+        }
+        CloseHandle (w);
+        w = h;
+    }
+
+    filedes[0] = handle_to_fd (r);
+    filedes[1] = handle_to_fd (w);
+    DEBUG5 ("CreatePipe %p %p %d %d inherit=%d\n", r, w,
+                   filedes[0], filedes[1], inherit_idx );
+    return 0;
+}
+
+int
+_gpgme_io_close ( int fd )
+{
+    int i;
+    void (*handler)(int, void*) = NULL;
+    void *value = NULL;
+
+    if ( fd == -1 )
+        return -1;
+
+    DEBUG1 ("** closing handle for fd %d\n", fd);
+    kill_reader (fd);
+    kill_writer (fd);
+    LOCK (notify_table_lock);
+    for ( i=0; i < DIM (notify_table); i++ ) {
+        if (notify_table[i].inuse && notify_table[i].fd == fd) {
+            handler = notify_table[i].handler;
+            value   = notify_table[i].value;
+            notify_table[i].handler = NULL;
+            notify_table[i].value = NULL;
+            notify_table[i].inuse = 0;
+            break;
+        }
+    }
+    UNLOCK (notify_table_lock);
+    if (handler)
+        handler (fd, value);
+
+    if ( !CloseHandle (fd_to_handle (fd)) ) { 
+        DEBUG2 ("CloseHandle for fd %d failed: ec=%d\n",
+                 fd, (int)GetLastError ());
+        return -1;
+    }
+
+    return 0;
+}
+
+int
+_gpgme_io_set_close_notify (int fd, void (*handler)(int, void*), void *value)
+{
+    int i;
+
+    assert (fd != -1);
+
+    LOCK (notify_table_lock);
+    for (i=0; i < DIM (notify_table); i++ ) {
+        if ( notify_table[i].inuse && notify_table[i].fd == fd )
+            break;
+    }
+    if ( i == DIM (notify_table) ) {
+        for (i=0; i < DIM (notify_table); i++ ) {
+            if ( !notify_table[i].inuse )
+                break;
+        }
+    }
+    if ( i == DIM (notify_table) ) {
+        UNLOCK (notify_table_lock);
+        return -1;
+    }
+    notify_table[i].fd = fd;
+    notify_table[i].handler = handler;
+    notify_table[i].value = value;
+    notify_table[i].inuse = 1;
+    UNLOCK (notify_table_lock);
+    DEBUG2 ("set notification for fd %d (idx=%d)", fd, i );
+    return 0;
+}
+
+
+int
+_gpgme_io_set_nonblocking ( int fd )
+{
+    return 0;
+}
+
+
+static char *
+build_commandline (char **argv)
+{
+  int i;
+  int j;
+  int n = 0;
+  char *buf;
+  char *p;
+  
+  /* We have to quote some things because under Windows the program
+     parses the commandline and does some unquoting.  We enclose the
+     whole argument in double-quotes, and escape literal double-quotes
+     as well as backslashes with a backslash.  We end up with a
+     trailing space at the end of the line, but that is harmless.  */
+  for (i = 0; argv[i]; i++)
+    {
+      p = argv[i];
+      /* The leading double-quote.  */
+      n++;
+      while (*p)
+	{
+	  /* An extra one for each literal that must be escaped.  */
+	  if (*p == '\\' || *p == '"')
+	    n++;
+	  n++;
+	  p++;
+	}
+      /* The trailing double-quote and the delimiter.  */
+      n += 2;
+    }
+  /* And a trailing zero.  */
+  n++;
+
+  buf = p = malloc (n);
+  if (!buf)
+    return NULL;
+  for (i = 0; argv[i]; i++)
+    {
+      char *argvp = argv[i];
+
+      *(p++) = '"';
+      while (*argvp)
+	{
+	  if (*argvp == '\\' || *argvp == '"')
+	    *(p++) = '\\';
+	  *(p++) = *(argvp++);
+	}
+      *(p++) = '"';
+      *(p++) = ' ';
+    }
+  *(p++) = 0;
+
+  return buf;
+}
+
+
+int
+_gpgme_io_spawn ( const char *path, char **argv,
+                  struct spawn_fd_item_s *fd_child_list,
+                  struct spawn_fd_item_s *fd_parent_list )
+{
+    SECURITY_ATTRIBUTES sec_attr;
+    PROCESS_INFORMATION pi = {
+        NULL,      /* returns process handle */
+        0,         /* returns primary thread handle */
+        0,         /* returns pid */
+        0         /* returns tid */
+    };
+    STARTUPINFO si;
+    char *envblock = NULL;
+    int cr_flags = CREATE_DEFAULT_ERROR_MODE
+                 | GetPriorityClass (GetCurrentProcess ());
+    int i;
+    char *arg_string;
+    int duped_stdin = 0;
+    int duped_stderr = 0;
+    HANDLE hnul = INVALID_HANDLE_VALUE;
+    /* FIXME.  */
+    int debug_me = 0;
+
+    memset (&sec_attr, 0, sizeof sec_attr );
+    sec_attr.nLength = sizeof sec_attr;
+    sec_attr.bInheritHandle = FALSE;
+
+    arg_string = build_commandline ( argv );
+    if (!arg_string )
+        return -1; 
+
+    memset (&si, 0, sizeof si);
+    si.cb = sizeof (si);
+    si.dwFlags = STARTF_USESTDHANDLES | STARTF_USESHOWWINDOW;
+    si.wShowWindow = debug_me? SW_SHOW : SW_HIDE;
+    si.hStdInput = GetStdHandle (STD_INPUT_HANDLE);
+    si.hStdOutput = GetStdHandle (STD_OUTPUT_HANDLE);
+    si.hStdError = GetStdHandle (STD_ERROR_HANDLE);
+
+    for (i=0; fd_child_list[i].fd != -1; i++ ) {
+        if (fd_child_list[i].dup_to == 0 ) {
+            si.hStdInput = fd_to_handle (fd_child_list[i].fd);
+            DEBUG1 ("using %d for stdin", fd_child_list[i].fd );
+            duped_stdin=1;
+        }
+        else if (fd_child_list[i].dup_to == 1 ) {
+            si.hStdOutput = fd_to_handle (fd_child_list[i].fd);
+            DEBUG1 ("using %d for stdout", fd_child_list[i].fd );
+        }
+        else if (fd_child_list[i].dup_to == 2 ) {
+            si.hStdError = fd_to_handle (fd_child_list[i].fd);
+            DEBUG1 ("using %d for stderr", fd_child_list[i].fd );
+            duped_stderr = 1;
+        }
+    }
+
+    if( !duped_stdin || !duped_stderr ) {
+        SECURITY_ATTRIBUTES sa;
+
+        memset (&sa, 0, sizeof sa );
+        sa.nLength = sizeof sa;
+        sa.bInheritHandle = TRUE;
+        hnul = CreateFile ( "nul",
+                            GENERIC_READ|GENERIC_WRITE,
+                            FILE_SHARE_READ|FILE_SHARE_WRITE,
+                            &sa,
+                            OPEN_EXISTING,
+                            FILE_ATTRIBUTE_NORMAL,
+                            NULL );
+        if ( hnul == INVALID_HANDLE_VALUE ) {
+            DEBUG1 ("can't open `nul': ec=%d\n", (int)GetLastError ());
+            free (arg_string);
+            return -1;
+        }
+        /* Make sure that the process has a connected stdin */
+        if ( !duped_stdin ) {
+            si.hStdInput = hnul;
+            DEBUG1 ("using %d for dummy stdin", (int)hnul );
+        }
+        /* We normally don't want all the normal output */
+        if ( !duped_stderr ) {
+            si.hStdError = hnul;
+            DEBUG1 ("using %d for dummy stderr", (int)hnul );
+        }
+    }
+
+    DEBUG2 ("CreateProcess, path=`%s' args=`%s'", path, arg_string);
+    cr_flags |= CREATE_SUSPENDED; 
+    if ( !CreateProcessA (path,
+                          arg_string,
+                          &sec_attr,     /* process security attributes */
+                          &sec_attr,     /* thread security attributes */
+                          TRUE,          /* inherit handles */
+                          cr_flags,      /* creation flags */
+                          envblock,      /* environment */
+                          NULL,          /* use current drive/directory */
+                          &si,           /* startup information */
+                          &pi            /* returns process information */
+        ) ) {
+        DEBUG1 ("CreateProcess failed: ec=%d\n", (int) GetLastError ());
+        free (arg_string);
+        return -1;
+    }
+
+    /* Close the /dev/nul handle if used. */
+    if (hnul != INVALID_HANDLE_VALUE ) {
+        if ( !CloseHandle ( hnul ) )
+            DEBUG1 ("CloseHandle(hnul) failed: ec=%d\n", (int)GetLastError());
+    }
+
+    /* Close the other ends of the pipes. */
+    for (i = 0; fd_parent_list[i].fd != -1; i++)
+      _gpgme_io_close (fd_parent_list[i].fd);
+
+    DEBUG4 ("CreateProcess ready\n"
+            "-   hProcess=%p  hThread=%p\n"
+            "-   dwProcessID=%d dwThreadId=%d\n",
+            pi.hProcess, pi.hThread, 
+            (int) pi.dwProcessId, (int) pi.dwThreadId);
+
+    if ( ResumeThread ( pi.hThread ) < 0 ) {
+        DEBUG1 ("ResumeThread failed: ec=%d\n", (int)GetLastError ());
+    }
+
+    if ( !CloseHandle (pi.hThread) ) { 
+        DEBUG1 ("CloseHandle of thread failed: ec=%d\n",
+                 (int)GetLastError ());
+    }
+
+    return handle_to_pid (pi.hProcess);
+}
+
+
+/*
+ * Select on the list of fds.
+ * Returns: -1 = error
+ *           0 = timeout or nothing to select
+ *          >0 = number of signaled fds
+ */
+int
+_gpgme_io_select ( struct io_select_fd_s *fds, size_t nfds, int nonblock )
+{
+    HANDLE waitbuf[MAXIMUM_WAIT_OBJECTS];
+    int    waitidx[MAXIMUM_WAIT_OBJECTS];
+    int code, nwait;
+    int i, any;
+    int count;
+    void *dbg_help;
+
+ restart:
+    DEBUG_BEGIN (dbg_help, 3, "select on [ ");
+    any = 0;
+    nwait = 0;
+    count = 0;
+    for ( i=0; i < nfds; i++ ) {
+        if ( fds[i].fd == -1 ) 
+            continue;
+        fds[i].signaled = 0;
+        if ( fds[i].for_read || fds[i].for_write ) {
+            if ( fds[i].frozen ) {
+                DEBUG_ADD1 (dbg_help, "f%d ", fds[i].fd );
+            }
+            else if ( fds[i].for_read ) {
+                struct reader_context_s *c = find_reader (fds[i].fd,1);
+                
+                if (!c) { 
+                    DEBUG1 ("oops: no reader thread for fd %d", fds[i].fd);
+                }
+                else {
+                    if ( nwait >= DIM (waitbuf) ) {
+                        DEBUG_END (dbg_help, "oops ]");
+                        DEBUG0 ("Too many objects for WFMO!" );
+                        return -1;
+                    }
+                    waitidx[nwait]   = i;
+                    waitbuf[nwait++] = c->have_data_ev;
+                }
+                DEBUG_ADD1 (dbg_help, "r%d ", fds[i].fd );
+                any = 1;
+            }
+            else if ( fds[i].for_write ) {
+                struct writer_context_s *c = find_writer (fds[i].fd,1);
+                
+                if (!c) { 
+                    DEBUG1 ("oops: no writer thread for fd %d", fds[i].fd);
+                }
+                else {
+                    if ( nwait >= DIM (waitbuf) ) {
+                        DEBUG_END (dbg_help, "oops ]");
+                        DEBUG0 ("Too many objects for WFMO!" );
+                        return -1;
+                    }
+		    waitidx[nwait]   = i;
+		    waitbuf[nwait++] = c->is_empty;
+                }
+		DEBUG_ADD1 (dbg_help, "w%d ", fds[i].fd );
+		any = 1;
+            }
+        }
+    }
+    DEBUG_END (dbg_help, "]");
+    if (!any) 
+        return 0;
+
+    code = WaitForMultipleObjects ( nwait, waitbuf, 0, nonblock ? 0 : 1000);
+    if ( code >= WAIT_OBJECT_0 && code < WAIT_OBJECT_0 + nwait ) {
+        /* This WFMO is a really silly function:  It does return either
+         * the index of the signaled object or if 2 objects have been
+         * signalled at the same time, the index of the object with the
+         * lowest object is returned - so and how do we find out
+         * how many objects have been signaled???.
+         * The only solution I can imagine is to test each object starting
+         * with the returned index individually - how dull.
+         */
+        any = 0;
+        for (i=code - WAIT_OBJECT_0; i < nwait; i++ ) {
+            if (WaitForSingleObject (waitbuf[i], 0) == WAIT_OBJECT_0) {
+                assert (waitidx[i] >=0 && waitidx[i] < nfds);
+                fds[waitidx[i]].signaled = 1;
+                any = 1;
+                count++;
+            }
+        }
+        if (!any) {
+            DEBUG0 ("Oops: No signaled objects found after WFMO");
+            count = -1;
+        }
+    }
+    else if ( code == WAIT_TIMEOUT ) {
+        DEBUG0 ("WFMO timed out\n" );
+    }  
+    else if (code == WAIT_FAILED ) {
+        int le = (int)GetLastError ();
+        if ( le == ERROR_INVALID_HANDLE ) {
+            int k, j = handle_to_fd (waitbuf[i]);
+                    
+            DEBUG1 ("WFMO invalid handle %d removed\n", j);
+            for (k=0 ; k < nfds; k++ ) {
+                if ( fds[k].fd == j ) {
+                    fds[k].for_read = fds[k].for_write = 0;
+                    goto restart;
+                }
+            }
+            DEBUG0 (" oops, or not???\n");
+        }
+        DEBUG1 ("WFMO failed: %d\n", le );
+        count = -1;
+    }
+    else {
+        DEBUG1 ("WFMO returned %d\n", code );
+        count = -1;
+    }
+
+    if ( count ) {
+        DEBUG_BEGIN (dbg_help, 3, " signaled [ ");
+        for ( i=0; i < nfds; i++ ) {
+            if ( fds[i].fd == -1 ) 
+                continue;
+            if ( (fds[i].for_read || fds[i].for_write) && fds[i].signaled ) {
+                DEBUG_ADD2 (dbg_help, "%c%d ",
+                            fds[i].for_read? 'r':'w',fds[i].fd );
+            }
+        }
+        DEBUG_END (dbg_help, "]");
+    }
+    
+    return count;
+}
+
+void
+_gpgme_io_subsystem_init (void)
+{
+  
+}
+
+
+/* Write the printable version of FD to the buffer BUF of length
+   BUFLEN.  The printable version is the representation on the command
+   line that the child process expects.  */
+int
+_gpgme_io_fd2str (char *buf, int buflen, int fd)
+{
+  return snprintf (buf, buflen, "%d", fd);
+}
+
+
+/* The following interface is only useful for GPGME Glib.  */
+
+/* Look up the giochannel for file descriptor FD.  */
+void *
+gpgme_get_giochannel (int fd)
+{
+  return NULL;
+}
+