Merge in the pthread library. This is the linuxthreads library taken from

glibc 2.1.3 and ported to work with uClibc by Stefan Soucek and Erik Andersen
(me).  Stefan has hacked things up such that linuxthreads runs on MMU-less
systems (tested only on arm-nommu).  Erik cleaned things up and made it work
properly as a shared library.
 -Erik

1 files changed, 128 insertions, 0 deletions

diff --git a/libpthread/linuxthreads_db/td_ta_event_getmsg.c b/libpthread/linuxthreads_db/td_ta_event_getmsg.c
new file mode 100644
index 000000000..4c635dc10
--- /dev/null
+++ b/libpthread/linuxthreads_db/td_ta_event_getmsg.c
@@ -0,0 +1,128 @@
+/* Retrieve event.
+   Copyright (C) 1999 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Ulrich Drepper <drepper@cygnus.com>, 1999.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Library General Public License as
+   published by the Free Software Foundation; either version 2 of the
+   License, or (at your option) any later version.
+
+   The GNU C Library 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
+   Library General Public License for more details.
+
+   You should have received a copy of the GNU Library General Public
+   License along with the GNU C Library; see the file COPYING.LIB.  If not,
+   write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+   Boston, MA 02111-1307, USA.  */
+
+#include <stddef.h>
+#include <string.h>
+
+#include "thread_dbP.h"
+
+
+td_err_e
+td_ta_event_getmsg (const td_thragent_t *ta, td_event_msg_t *msg)
+{
+  /* XXX I cannot think of another way but using a static variable.  */
+  static td_thrhandle_t th;
+  td_eventbuf_t event;
+  psaddr_t addr;
+
+  LOG (__FUNCTION__);
+
+  /* Test whether the TA parameter is ok.  */
+  if (! ta_ok (ta))
+    return TD_BADTA;
+
+  /* Get the pointer to the thread descriptor with the last event.  */
+  if (ps_pdread (ta->ph, ta->pthread_last_event,
+		 &addr, sizeof (void *)) != PS_OK)
+    return TD_ERR;	/* XXX Other error value?  */
+
+  /* If the pointer is NULL no event occurred.  */
+  if (addr == 0)
+    return TD_NOMSG;
+
+  /* Read the even structure from the target.  */
+  if (ps_pdread (ta->ph,
+		 ((char *) addr
+		  + offsetof (struct _pthread_descr_struct, p_eventbuf)),
+		 &event, sizeof (td_eventbuf_t)) != PS_OK)
+    return TD_ERR;	/* XXX Other error value?  */
+
+  /* Check whether an event occurred.  */
+  if (event.eventnum == TD_EVENT_NONE)
+    {
+      /* Oh well, this means the last event was already read.  So
+	 we have to look for any other event.  */
+      struct pthread_handle_struct handles[ta->pthread_threads_max];
+      int num;
+      int i;
+
+      /* Read the number of currently active threads.  */
+      if (ps_pdread (ta->ph, ta->pthread_handles_num, &num, sizeof (int))
+	  != PS_OK)
+	return TD_ERR;	/* XXX Other error value?  */
+
+      /* Now read the handles.  */
+      if (ps_pdread (ta->ph, ta->handles, handles,
+		     ta->pthread_threads_max * sizeof (handles[0])) != PS_OK)
+	return TD_ERR;	/* XXX Other error value?  */
+
+      for (i = 0; i < ta->pthread_threads_max && num > 0; ++i)
+	{
+	  if (handles[i].h_descr == NULL)
+	    /* No entry here.  */
+	    continue;
+
+	  /* First count this active thread.  */
+	  --num;
+
+	  if (handles[i].h_descr == addr)
+	    /* We already handled this.  */
+	    continue;
+
+	  /* Read the event data for this thread.  */
+	  if (ps_pdread (ta->ph,
+			 ((char *) handles[i].h_descr
+			  + offsetof (struct _pthread_descr_struct,
+				      p_eventbuf)),
+			 &event, sizeof (td_eventbuf_t)) != PS_OK)
+	    return TD_ERR;
+
+	  if (event.eventnum != TD_EVENT_NONE)
+	    {
+	      /* We found a thread with an unreported event.  */
+	      addr = handles[i].h_descr;
+	      break;
+	    }
+	}
+
+      /* If we haven't found any other event signal this to the user.  */
+      if (event.eventnum == TD_EVENT_NONE)
+	return TD_NOMSG;
+    }
+
+  /* Generate the thread descriptor.  */
+  th.th_ta_p = (td_thragent_t *) ta;
+  th.th_unique = addr;
+
+  /* Fill the user's data structure.  */
+  msg->event = event.eventnum;
+  msg->th_p = &th;
+  msg->msg.data = (uintptr_t) event.eventdata;
+
+  /* And clear the event message in the target.  */
+  memset (&event, '\0', sizeof (td_eventbuf_t));
+  if (ps_pdwrite (ta->ph,
+		  ((char *) addr
+		   + offsetof (struct _pthread_descr_struct, p_eventbuf)),
+		  &event, sizeof (td_eventbuf_t)) != PS_OK)
+    return TD_ERR;	/* XXX Other error value?  */
+
+  return TD_OK;
+}