Reworked the process code.

TODO

@@ -4,5 +4,3 @@
 
 * Allow to use GTK's main loop instead of the select stuff in
   wait.c
-
-* need to close a lot of handles in w32-io.c

configure.in

@@ -13,7 +13,7 @@ AM_MAINTAINER_MODE
 #    AGE, set REVISION to 0.
 # 3. Interfaces removed (BAD, breaks upward compatibility): Increment
 #    CURRENT, set AGE and REVISION to 0.
-AM_INIT_AUTOMAKE(gpgme,0.1.4a)
+AM_INIT_AUTOMAKE(gpgme,0.1.4b)
 LIBGPGME_LT_CURRENT=2
 LIBGPGME_LT_AGE=2
 LIBGPGME_LT_REVISION=0

gpgme/ChangeLog

@@ -1,5 +1,21 @@
+2001-02-20  Werner Koch  <wk@gnupg.org>
+
+	* w32-io.c (destroy_reader,kill_reader): New. 
+	(create_reader, reader): Add a new event to stop the thread.
+	(_gpgme_io_close): Kill the reader thread.
+
+	* posix-io.c (_gpgme_io_select): Handle frozen fds here. 
+	* 32-io.c (_gpgme_io_select): Ditto. Removed a bunch of unused code.
+
+	* wait.c: Reworked the whole thing.
+	* rungpg.c (_gpgme_gpg_new): Init pid to -1.
+	(_gpgme_gpg_release): Remove the process from the wait queue.
+
 2001-02-19  Werner Koch  <wk@gnupg.org>
 
+	* w32-io.c (_gpgme_io_set_close_notify): New.
+	(_gpgme_io_close): Do the notification.
+
 	* posix-io.c (_gpgme_io_select): Use a 1 sec timeout and not 200
 	microseconds.
 

gpgme/gpgme.h

@@ -43,7 +43,7 @@ extern "C" {
  * let autoconf (using the AM_PATH_GPGME macro) check that this
  * header matches the installed library.
  * Warning: Do not edit the next line.  configure will do that for you! */
-#define GPGME_VERSION "0.1.4a"
+#define GPGME_VERSION "0.1.4b"
 
 
 

gpgme/posix-io.c

@@ -267,7 +267,10 @@ _gpgme_io_select ( struct io_select_fd_s *fds, size_t nfds )
     for ( i=0; i < nfds; i++ ) {
         if ( fds[i].fd == -1 ) 
             continue;
-        if ( fds[i].for_read ) {
+        if ( fds[i].frozen ) {
+            DEBUG_ADD1 (dbg_help, "f%d ", fds[i].fd );
+        }
+        else if ( fds[i].for_read ) {
             assert ( !FD_ISSET ( fds[i].fd, &readfds ) );
             FD_SET ( fds[i].fd, &readfds );
             if ( fds[i].fd > max_fd )

gpgme/rungpg.c

@@ -197,6 +197,8 @@ _gpgme_gpg_new ( GpgObject *r_gpg )
     gpg->colon.fd[1] = -1;
     gpg->cmd.fd = -1;
 
+    gpg->pid = -1;
+
     /* allocate the read buffer for the status pipe */
     gpg->status.bufsize = 1024;
     gpg->status.readpos = 0;
@@ -250,6 +252,8 @@ _gpgme_gpg_release ( GpgObject gpg )
         free_argv (gpg->argv);
     xfree (gpg->cmd.keyword);
 
+    if (gpg->pid != -1) 
+        _gpgme_remove_proc_from_wait_queue ( gpg->pid );
     if (gpg->status.fd[0] != -1 )
         _gpgme_io_close (gpg->status.fd[0]);
     if (gpg->status.fd[1] != -1 )

gpgme/w32-io.c

@@ -52,11 +52,21 @@
 
 #define READBUF_SIZE 4096
 
+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;
@@ -64,6 +74,7 @@ struct reader_context_s {
 
     HANDLE have_data_ev;  /* manually reset */
     HANDLE have_space_ev; /* auto reset */
+    HANDLE stopped;
     size_t readpos, writepos;
     char buffer[READBUF_SIZE];
 };
@@ -109,7 +120,7 @@ reader (void *arg)
     DEBUG2 ("reader thread %p for file %p started", c->thread_hd, c->file_hd );
     for (;;) {
         LOCK (c->mutex);
-        /* leave a one byte gap so that we can see wheter it is empty or full*/
+        /* 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) )
@@ -120,6 +131,10 @@ reader (void *arg)
             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;
@@ -149,6 +164,10 @@ reader (void *arg)
         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 ());
@@ -158,6 +177,7 @@ reader (void *arg)
     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;
 }
@@ -182,12 +202,15 @@ create_reader (HANDLE fd)
     c->file_hd = fd;
     c->have_data_ev = CreateEvent (&sec_attr, TRUE, FALSE, NULL);
     c->have_space_ev = CreateEvent (&sec_attr, FALSE, TRUE, NULL);
-    if (!c->have_data_ev || !c->have_space_ev) {
+    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);
         xfree (c);
         return NULL;
     }
@@ -204,6 +227,8 @@ create_reader (HANDLE fd)
             CloseHandle (c->have_data_ev);
         if (c->have_space_ev)
             CloseHandle (c->have_space_ev);
+        if (c->stopped)
+            CloseHandle (c->stopped);
         xfree (c);
         return NULL;
     }    
@@ -211,6 +236,27 @@ create_reader (HANDLE fd)
     return c;
 }
 
+static void
+destroy_reader (struct reader_context_s *c)
+{
+    if (c->have_space_ev) 
+        SetEvent (c->have_space_ev);
+
+    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);
+    xfree (c);
+}
+
 
 /* 
  * Find a reader context or create a new one 
@@ -243,6 +289,24 @@ find_reader (int fd, int start_it)
 }
 
 
+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 )
@@ -375,11 +439,29 @@ _gpgme_io_pipe ( int filedes[2], int inherit_idx )
 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);
-    /* fixme: destroy thread */
+    kill_reader (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",
@@ -390,6 +472,37 @@ _gpgme_io_close ( int fd )
     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 )
@@ -563,7 +676,8 @@ int
 _gpgme_io_waitpid ( int pid, int hang, int *r_status, int *r_signal )
 {
     HANDLE proc = fd_to_handle (pid);
-    int code, exc, ret = 0;
+    int code, ret = 0;
+    DWORD exc;
 
     *r_status = 0;
     *r_signal = 0;
@@ -619,7 +733,6 @@ _gpgme_io_kill ( int pid, int hard )
 int
 _gpgme_io_select ( struct io_select_fd_s *fds, size_t nfds )
 {
-#if 1
     HANDLE waitbuf[MAXIMUM_WAIT_OBJECTS];
     int    waitidx[MAXIMUM_WAIT_OBJECTS];
     int code, nwait;
@@ -631,11 +744,16 @@ _gpgme_io_select ( struct io_select_fd_s *fds, size_t nfds )
     DEBUG_BEGIN (dbg_help, "select on [ ");
     any = any_write = 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].for_read ) {
+            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) { 
@@ -650,28 +768,24 @@ _gpgme_io_select ( struct io_select_fd_s *fds, size_t nfds )
                     waitidx[nwait]   = i;
                     waitbuf[nwait++] = c->have_data_ev;
                 }
-            }
+                DEBUG_ADD1 (dbg_help, "r%d ", fds[i].fd );
-            DEBUG_ADD2 (dbg_help, "%c%d ",
-                        fds[i].for_read? 'r':'w',fds[i].fd );
                 any = 1;
             }
-        fds[i].signaled = 0;
+            else if ( fds[i].for_write ) {
-    }
+                DEBUG_ADD1 (dbg_help, "w%d ", fds[i].fd );
-    DEBUG_END (dbg_help, "]");
+                any = 1;
-    if (!any) 
+                /* no way to see whether a handle is ready for writing,
-        return 0;
+                 * so we signal them all */
-
-    count = 0;
-    /* no way to see whether a handle is ready for writing, signal all */
-    for ( i=0; i < nfds; i++ ) {
-        if ( fds[i].fd == -1 ) 
-            continue;
-        if ( fds[i].for_write ) {
                 fds[i].signaled = 1;
                 any_write =1;
                 count++;
             }
         }
+    }
+    DEBUG_END (dbg_help, "]");
+    if (!any) 
+        return 0;
+
     code = WaitForMultipleObjects ( nwait, waitbuf, 0, any_write? 200:1000);
     if ( code >= WAIT_OBJECT_0 && code < WAIT_OBJECT_0 + nwait ) {
         /* This WFMO is a really silly function:  It does return either
@@ -735,79 +849,6 @@ _gpgme_io_select ( struct io_select_fd_s *fds, size_t nfds )
     }
     
     return count;
-#else  /* This is the code we use */
-    int i, any, count;
-    int once_more = 0;
-
-    DEBUG_SELECT ((stderr, "gpgme:fakedselect on [ "));
-    any = 0;
-    for ( i=0; i < nfds; i++ ) {
-        if ( fds[i].fd == -1 ) 
-            continue;
-        if ( fds[i].for_read || fds[i].for_write ) {
-            DEBUG_SELECT ((stderr, "%c%d ",
-                           fds[i].for_read? 'r':'w',fds[i].fd ));
-            any = 1;
-        }
-        fds[i].signaled = 0;
-    }
-    DEBUG_SELECT ((stderr, "]\n" ));
-    if (!any) 
-        return 0;
-
- restart:
-    count = 0;
-    /* no way to see whether a handle is ready fro writing, signal all */
-    for ( i=0; i < nfds; i++ ) {
-        if ( fds[i].fd == -1 ) 
-            continue;
-        if ( fds[i].for_write ) {
-            fds[i].signaled = 1;
-            count++;
-        }
-    }
-
-    /* now peek on all read handles */
-    for ( i=0; i < nfds; i++ ) {
-        if ( fds[i].fd == -1 ) 
-            continue;
-        if ( fds[i].for_read ) {
-            int navail;
-            
-            if ( !PeekNamedPipe (fd_to_handle (fds[i].fd),
-                                 NULL, 0, NULL, &navail, NULL) ) {
-                DEBUG1 ("select: PeekFile failed: ec=%d\n",
-                        (int)GetLastError ());
-            }
-            else if ( navail ) {
-                DEBUG2 ("fd %d has %d bytes to read\n",  fds[i].fd, navail );
-                fds[i].signaled = 1;
-                count++;
-            }
-        }
-    }
-    if ( !once_more && !count ) {
-        /* once more but after relinquishing our timeslot */
-        once_more = 1;
-        Sleep (0);
-        goto restart;
-    }
-
-    if ( count ) {
-        DEBUG_SELECT ((stderr, "gpgme:      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_SELECT ((stderr, "%c%d ",
-                               fds[i].for_read? 'r':'w',fds[i].fd ));
-            }
-        }
-        DEBUG_SELECT ((stderr, "]\n" ));
-    }
-    
-    return count;
-#endif
 }
 
 #endif /*HAVE_DOSISH_SYSTEM*/

gpgme/wait.c

@@ -31,85 +31,105 @@
 #include "context.h"
 #include "ops.h"
 #include "wait.h"
+#include "sema.h"
 #include "io.h"
 
-/* Fixme: implement the following stuff to make the code MT safe.
+struct wait_item_s;
- * To avoid the need to link against a specific threads lib, such
+struct proc_s;
- * an implementation should require the caller to register a function
- * which does this task.
- * enter_crit() and leave_crit() are used to embrace an area of code
- * which should be executed only by one thread at a time.
- * lock_xxxx() and unlock_xxxx()  protect access to an data object.
- *  */
-#define enter_crit()    do { } while (0)
-#define leave_crit()    do { } while (0)
-#define lock_table()    do { } while (0)
-#define unlock_table()  do { } while (0)
 
-
+static struct proc_s *proc_queue;
-struct wait_item_s {
+DEFINE_STATIC_LOCK (proc_queue_lock);
-    volatile int active;
-    int (*handler)(void*,int,int);
-    void *handler_value;
-    int pid;
-    int inbound;       /* this is an inbound data handler fd */
-    GpgmeCtx ctx;
-};
 
 static int fd_table_size;
 static struct io_select_fd_s *fd_table;
+DEFINE_STATIC_LOCK (fd_table_lock);
 
 static void (*idle_function) (void);
 
+
+struct proc_s {
+    struct proc_s *next;
+    int pid;
+    GpgmeCtx ctx;
+    struct wait_item_s *handler_list;
+    int ready;
+};
+
+struct wait_item_s {
+    struct wait_item_s *next;
+    int (*handler)(void*,int,int);
+    void *handler_value;
+    int inbound;       /* this is an inbound data handler fd */
+    struct proc_s *proc; /* backlink */
+    int ready;
+    int frozen; /* copy of the frozen flag from the fd_table */
+};
+
+
+
 static int do_select ( void );
 static void run_idle (void);
 
 
-static struct wait_item_s *
+/* only to be called with a locked proc_queue */
-queue_item_from_context ( GpgmeCtx ctx )
-{
-    struct wait_item_s *q;
-    int i;
-
-    for (i=0; i < fd_table_size; i++ ) {
-        if ( fd_table[i].fd != -1 && (q=fd_table[i].opaque) && q->ctx == ctx )
-            return q;
-    }
-    return NULL;
-}
-
-
 static int
-count_active_and_thawed_fds ( int pid )
+count_running_fds ( struct proc_s *proc )
 {
     struct wait_item_s *q;
-    int i, count = 0;
+    int count = 0;
 
-    for (i=0; i < fd_table_size; i++ ) {
+    for (q=proc->handler_list; q; q=q->next) {
-        if ( fd_table[i].fd != -1 && (q=fd_table[i].opaque)
+        if ( !q->frozen && !q->ready )
-             && q->active && !fd_table[i].frozen && q->pid == pid  ) 
             count++;
     }
     return count;
 }
 
-/* remove the given process from the queue */
+/* only to be called with a locked proc_queue */
-/* FIXME: We should do this on demand from rungpg.c */
 static void
-remove_process ( int pid )
+set_process_ready ( struct proc_s *proc )
 {
-    struct wait_item_s *q;
+    struct wait_item_s *q, *q2;
     int i;
 
+    assert (proc);
+    DEBUG2 ("set_process_ready(%p) pid=%d", proc, proc->pid );
+    LOCK (fd_table_lock);
+    for (q = proc->handler_list; q; q=q2) {
+        q2 = q->next;
         for (i=0; i < fd_table_size; i++ ) {
-        if (fd_table[i].fd != -1 && (q=fd_table[i].opaque) && q->pid == pid ) {
+            if (fd_table[i].fd != -1 && q == fd_table[i].opaque ) {
-            xfree (q);
                 fd_table[i].opaque = NULL;
                 fd_table[i].fd = -1;
             }
         }
+        xfree (q);
+    }
+    UNLOCK (fd_table_lock);
+    proc->handler_list = NULL;
+    proc->ready = 1;
 }
 
+void
+_gpgme_remove_proc_from_wait_queue ( int pid )
+{
+    struct proc_s *proc, *last;
+
+    DEBUG1 ("removing process %d", pid );
+    LOCK (proc_queue_lock);
+    for (last=NULL, proc=proc_queue; proc; last = proc, proc = proc->next ) {
+        if (proc->pid == pid ) {
+            set_process_ready (proc);
+            if (!last) 
+                proc_queue = proc->next;
+            else 
+                last->next = proc->next;
+            xfree (proc);
+            break;
+        }
+    }
+    UNLOCK (proc_queue_lock);
+}
 
 
 /**
@@ -134,28 +154,31 @@ gpgme_wait ( GpgmeCtx c, int hang )
 GpgmeCtx 
 _gpgme_wait_on_condition ( GpgmeCtx c, int hang, volatile int *cond )
 {
-    struct wait_item_s *q;
+    DEBUG3 ("waiting... ctx=%p hang=%d cond=%p", c, hang, cond );
-
     do {
         int did_work = do_select();
+        int any = 0;
+        struct proc_s *proc;
 
         if ( cond && *cond )
             hang = 0;
+        else {
+            LOCK (proc_queue_lock);
+            for (proc=proc_queue; proc; proc = proc->next ) {
+                if ( !proc->ready && !count_running_fds (proc) ) {
+                    set_process_ready (proc);
+                }
+                if (c && proc->ready && proc->ctx == c)
+                    hang = 0;
+                if ( !proc->ready )
+                    any = 1;
+            }
+            UNLOCK (proc_queue_lock);
+            if (!any)
+                hang = 0;
+        }
+        /* fixme: we should check here for hanging processes */
 
-        if ( !did_work ) {
-            /* We did no read/write - see whether the process is still
-             * alive */
-            assert (c); /* !c is not yet implemented */
-            q = queue_item_from_context ( c );
-            if (q) {
-                if ( !count_active_and_thawed_fds (q->pid) ) {
-                    remove_process (q->pid);
-                    hang = 0;
-                }
-            }
-            else
-                hang = 0;
-        }
         if (hang)
             run_idle ();
     } while (hang && !c->cancel );
@@ -177,7 +200,6 @@ _gpgme_wait_on_condition ( GpgmeCtx c, int hang, volatile int *cond )
 static int
 do_select ( void )
 {
-    struct wait_item_s *q;
     int i, n;
     int any=0;
     
@@ -188,18 +210,27 @@ do_select ( void )
     for (i=0; i < fd_table_size && n; i++ ) {
         if ( fd_table[i].fd != -1 && fd_table[i].signaled 
              && !fd_table[i].frozen ) {
-            q = fd_table[i].opaque;
+            struct wait_item_s *q;
+
             assert (n);
             n--;
-            if ( q->active )
+            
+            q = fd_table[i].opaque;
+            assert ( q );
+            assert ( q->proc );
+            assert ( !q->ready );
             any = 1;
-            if ( q->active && q->handler (q->handler_value,
+            if ( q->handler (q->handler_value,
-                                          q->pid, fd_table[i].fd ) ) {
+                             q->proc->pid, fd_table[i].fd ) ) {
-                DEBUG1 ("setting fd %d inactive", fd_table[i].fd );
+                DEBUG2 ("setting fd %d (q=%p) ready", fd_table[i].fd, q );
-                q->active = 0;
+                q->ready = 1;
+                /* free the table entry*/
+                LOCK (fd_table_lock);
                 fd_table[i].for_read = 0;
                 fd_table[i].for_write = 0;
                 fd_table[i].fd = -1;
+                fd_table[i].opaque = NULL;
+                UNLOCK (fd_table_lock);
             }
         }
     }
@@ -220,22 +251,42 @@ _gpgme_register_pipe_handler ( void *opaque,
 {
     GpgmeCtx ctx = opaque;
     struct wait_item_s *q;
+    struct proc_s *proc;
     int i;
 
     assert (opaque);
     assert (handler);
 
+    /* Allocate a structure to hold info about the handler */
     q = xtrycalloc ( 1, sizeof *q );
     if ( !q )
         return mk_error (Out_Of_Core);
     q->inbound = inbound;
     q->handler = handler;
     q->handler_value = handler_value;
-    q->pid = pid;
-    q->ctx = ctx;
-    q->active = 1;
 
-    lock_table ();
+    /* Put this into the process queue */
+    LOCK (proc_queue_lock);
+    for (proc=proc_queue; proc && proc->pid != pid; proc = proc->next)
+        ;
+    if (!proc) { /* a new process */
+        proc = xtrycalloc ( 1, sizeof *proc );
+        if (!proc) {
+            UNLOCK (proc_queue_lock);
+            return mk_error (Out_Of_Core);
+        }
+        proc->pid = pid;
+        proc->ctx = ctx;
+        proc->next = proc_queue;
+        proc_queue = proc;
+    }
+    assert (proc->ctx == ctx);
+    q->proc = proc;
+    q->next = proc->handler_list;
+    proc->handler_list = q;
+    UNLOCK (proc_queue_lock);
+    
+    LOCK (fd_table_lock);
  again:  
     for (i=0; i < fd_table_size; i++ ) {
         if ( fd_table[i].fd == -1 ) {
@@ -245,7 +296,7 @@ _gpgme_register_pipe_handler ( void *opaque,
             fd_table[i].signaled = 0;
             fd_table[i].frozen = 0;
             fd_table[i].opaque = q;
-            unlock_table ();
+            UNLOCK (fd_table_lock);
             return 0;
         }
     }
@@ -264,8 +315,9 @@ _gpgme_register_pipe_handler ( void *opaque,
         }
     }
 
-    unlock_table ();
+    UNLOCK (fd_table_lock);
     xfree (q);
+    /* FIXME: remove the proc table entry */
     return mk_error (Too_Many_Procs);
 }
 
@@ -275,15 +327,19 @@ _gpgme_freeze_fd ( int fd )
 {
     int i;
 
-    lock_table ();
+    LOCK (fd_table_lock);
     for (i=0; i < fd_table_size; i++ ) {
         if ( fd_table[i].fd == fd ) {
+            struct wait_item_s *q;
+
             fd_table[i].frozen = 1;
-            DEBUG1 ("fd %d frozen", fd );
+            if ( (q=fd_table[i].opaque) )
+                q->frozen = 1;
+            DEBUG2 ("fd %d frozen (q=%p)", fd, q );
             break;
         }
     }
-    unlock_table ();
+    UNLOCK (fd_table_lock);
 }
 
 void
@@ -291,15 +347,19 @@ _gpgme_thaw_fd ( int fd )
 {
     int i;
 
-    lock_table ();
+    LOCK (fd_table_lock);
     for (i=0; i < fd_table_size; i++ ) {
         if ( fd_table[i].fd == fd ) {
+            struct wait_item_s *q;
+
             fd_table[i].frozen = 0;
-            DEBUG1 ("fd %d thawed", fd );
+            if ( (q=fd_table[i].opaque) )
+                q->frozen = 0;
+            DEBUG2 ("fd %d thawed (q=%p)", fd, q );
             break;
         }
     }
-    unlock_table ();
+    UNLOCK (fd_table_lock);
 }
 
 

gpgme/wait.h

@@ -23,8 +23,7 @@
 
 #include "gpgme.h"
 
-#define SIZEOF_WAIT_QUEUE 10
+void _gpgme_remove_proc_from_wait_queue ( int pid );
-
 
 GpgmeError _gpgme_register_pipe_handler ( 
     void *opaque, 
@@ -32,8 +31,6 @@ GpgmeError _gpgme_register_pipe_handler(
     void *handler_value,
     int pid, int fd, int inbound );
 
-
-
 #endif /* WAIT_H */