*** empty log message ***

2 files changed, 385 insertions, 226 deletions

diff --git a/eio.c b/eio.c
index 18ed01f..c5cb845 100644
--- a/eio.c
+++ b/eio.c
@@ -1,3 +1,42 @@
+/*
+ * libeio implementation
+ *
+ * Copyright (c) 2007,2008 Marc Alexander Lehmann <libeio@schmorp.de>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without modifica-
+ * tion, are permitted provided that the following conditions are met:
+ * 
+ *   1.  Redistributions of source code must retain the above copyright notice,
+ *       this list of conditions and the following disclaimer.
+ * 
+ *   2.  Redistributions in binary form must reproduce the above copyright
+ *       notice, this list of conditions and the following disclaimer in the
+ *       documentation and/or other materials provided with the distribution.
+ * 
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
+ * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO
+ * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
+ * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
+ * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH-
+ * ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
+ * OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * Alternatively, the contents of this file may be used under the terms of
+ * the GNU General Public License ("GPL") version 2 or any later version,
+ * in which case the provisions of the GPL are applicable instead of
+ * the above. If you wish to allow the use of your version of this file
+ * only under the terms of the GPL and not to allow others to use your
+ * version of this file under the BSD license, indicate your decision
+ * by deleting the provisions above and replace them with the notice
+ * and other provisions required by the GPL. If you do not delete the
+ * provisions above, a recipient may use your version of this file under
+ * either the BSD or the GPL.
+ */
+
 #include "eio.h"
 #include "xthread.h"
 
@@ -72,9 +111,9 @@
 
 #define dBUF	 				\
   char *eio_buf;				\
-  X_LOCK (etplock);				\
+  ETP_WORKER_LOCK (self);			\
   self->dbuf = eio_buf = malloc (EIO_BUFSIZE);	\
-  X_UNLOCK (etplock);				\
+  ETP_WORKER_UNLOCK (self);			\
   errno = ENOMEM;				\
   if (!eio_buf)					\
     return -1;
@@ -83,6 +122,34 @@
 
 /*****************************************************************************/
 
+#define ETP_PRI_MIN EIO_PRI_MIN
+#define ETP_PRI_MAX EIO_PRI_MAX
+
+#define ETP_REQ eio_req
+#define ETP_DESTROY(req) eio_destroy (req)
+static int eio_finish (eio_req *req);
+#define ETP_FINISH(req)  eio_finish (req)
+
+#define ETP_WORKER_CLEAR(req)	\
+  if (wrk->dbuf)		\
+    {				\
+      free (wrk->dbuf);		\
+      wrk->dbuf = 0;		\
+    }				\
+				\
+  if (wrk->dirp)		\
+    {				\
+      closedir (wrk->dirp);	\
+      wrk->dirp = 0;		\
+    }
+#define ETP_WORKER_COMMON \
+  void *dbuf;	\
+  DIR *dirp;
+
+/*****************************************************************************/
+
+#define ETP_NUM_PRI (ETP_PRI_MAX - ETP_PRI_MIN + 1)
+
 /* calculcate time difference in ~1/EIO_TICKS of a second */
 static int tvdiff (struct timeval *tv1, struct timeval *tv2)
 {
@@ -92,56 +159,48 @@ static int tvdiff (struct timeval *tv1, struct timeval *tv2)
 
 static unsigned int started, idle, wanted = 4;
 
-typedef struct etp_pool
-{
-  void (*want_poll_cb) (void);
-  void (*done_poll_cb) (void);
+static void (*want_poll_cb) (void);
+static void (*done_poll_cb) (void);
  
-  unsigned int max_poll_time;
-  unsigned int max_poll_reqs;
-} etp_pool;
+static unsigned int max_poll_time;     /* reslock */
+static unsigned int max_poll_reqs;     /* reslock */
 
-static volatile unsigned int nreqs, nready, npending;
+static volatile unsigned int nreqs;    /* reqlock */
+static volatile unsigned int nready;   /* reqlock */
+static volatile unsigned int npending; /* reqlock */
 static volatile unsigned int max_idle = 4;
 
-static mutex_t etplock = X_MUTEX_INIT;
+static mutex_t wrklock = X_MUTEX_INIT;
 static mutex_t reslock = X_MUTEX_INIT;
 static mutex_t reqlock = X_MUTEX_INIT;
 static cond_t  reqwait = X_COND_INIT;
 
-typedef struct worker
+typedef struct etp_worker
 {
-  /* locked by etplock */
-  struct worker *prev, *next;
+  /* locked by wrklock */
+  struct etp_worker *prev, *next;
 
   thread_t tid;
 
-  /* locked by reslock, reqlock or etplock */
-  eio_req *req; /* currently processed request */
-  void *dbuf;
-  DIR *dirp;
-} worker;
+  /* locked by reslock, reqlock or wrklock */
+  ETP_REQ *req; /* currently processed request */
+
+  ETP_WORKER_COMMON
+} etp_worker;
 
-static worker wrk_first = { &wrk_first, &wrk_first, 0 }; /* NOT etp */
+static etp_worker wrk_first = { &wrk_first, &wrk_first, 0 }; /* NOT etp */
+
+#define ETP_WORKER_LOCK(wrk)   X_LOCK   (wrklock)
+#define ETP_WORKER_UNLOCK(wrk) X_UNLOCK (wrklock)
 
 /* worker threads management */
 
-static void worker_clear (worker *wrk)
+static void etp_worker_clear (etp_worker *wrk)
 {
-  if (wrk->dirp)
-    {
-      closedir (wrk->dirp);
-      wrk->dirp = 0;
-    }
-
-  if (wrk->dbuf)
-    {
-      free (wrk->dbuf);
-      wrk->dbuf = 0;
-    }
+  ETP_WORKER_CLEAR (wrk);
 }
 
-static void worker_free (worker *wrk)
+static void etp_worker_free (etp_worker *wrk)
 {
   wrk->next->prev = wrk->prev;
   wrk->prev->next = wrk->next;
@@ -149,12 +208,16 @@ static void worker_free (worker *wrk)
   free (wrk);
 }
 
-unsigned int eio_nreqs (void)
+static unsigned int etp_nreqs (void)
 {
-  return nreqs;
+  int retval;
+  if (WORDACCESS_UNSAFE) X_LOCK   (reqlock);
+  retval = nreqs;
+  if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
+  return retval;
 }
 
-unsigned int eio_nready (void)
+static unsigned int etp_nready (void)
 {
   unsigned int retval;
 
@@ -165,7 +228,7 @@ unsigned int eio_nready (void)
   return retval;
 }
 
-unsigned int eio_npending (void)
+static unsigned int etp_npending (void)
 {
   unsigned int retval;
 
@@ -176,7 +239,7 @@ unsigned int eio_npending (void)
   return retval;
 }
 
-unsigned int eio_nthreads (void)
+static unsigned int etp_nthreads (void)
 {
   unsigned int retval;
 
@@ -193,14 +256,14 @@ unsigned int eio_nthreads (void)
  * per shift, the most expensive operation.
  */
 typedef struct {
-  eio_req *qs[EIO_NUM_PRI], *qe[EIO_NUM_PRI]; /* qstart, qend */
+  ETP_REQ *qs[ETP_NUM_PRI], *qe[ETP_NUM_PRI]; /* qstart, qend */
   int size;
-} reqq;
+} etp_reqq;
 
-static reqq req_queue;
-static reqq res_queue;
+static etp_reqq req_queue;
+static etp_reqq res_queue;
 
-static int reqq_push (reqq *q, eio_req *req)
+static int reqq_push (etp_reqq *q, ETP_REQ *req)
 {
   int pri = req->pri;
   req->next = 0;
@@ -216,7 +279,7 @@ static int reqq_push (reqq *q, eio_req *req)
   return q->size++;
 }
 
-static eio_req *reqq_shift (reqq *q)
+static ETP_REQ *reqq_shift (etp_reqq *q)
 {
   int pri;
 
@@ -225,7 +288,7 @@ static eio_req *reqq_shift (reqq *q)
 
   --q->size;
 
-  for (pri = EIO_NUM_PRI; pri--; )
+  for (pri = ETP_NUM_PRI; pri--; )
     {
       eio_req *req = q->qs[pri];
 
@@ -243,7 +306,7 @@ static eio_req *reqq_shift (reqq *q)
 
 static void etp_atfork_prepare (void)
 {
-  X_LOCK (etplock);
+  X_LOCK (wrklock);
   X_LOCK (reqlock);
   X_LOCK (reslock);
 #if !HAVE_PREADWRITE
@@ -264,28 +327,28 @@ static void etp_atfork_parent (void)
 #endif
   X_UNLOCK (reslock);
   X_UNLOCK (reqlock);
-  X_UNLOCK (etplock);
+  X_UNLOCK (wrklock);
 }
 
 static void etp_atfork_child (void)
 {
-  eio_req *prv;
+  ETP_REQ *prv;
 
   while (prv = reqq_shift (&req_queue))
-    eio_destroy (prv);
+    ETP_DESTROY (prv);
 
   while (prv = reqq_shift (&res_queue))
-    eio_destroy (prv);
+    ETP_DESTROY (prv);
 
   while (wrk_first.next != &wrk_first)
     {
-      worker *wrk = wrk_first.next;
+      etp_worker *wrk = wrk_first.next;
 
       if (wrk->req)
-        eio_destroy (wrk->req);
+        ETP_DESTROY (wrk->req);
 
-      worker_clear (wrk);
-      worker_free (wrk);
+      etp_worker_clear (wrk);
+      etp_worker_free (wrk);
     }
 
   started  = 0;
@@ -304,19 +367,199 @@ etp_once_init (void)
 }
 
 static int
-etp_init (etp_pool *etp, void (*want_poll)(void), void (*done_poll)(void))
+etp_init (void (*want_poll)(void), void (*done_poll)(void))
 {
   static pthread_once_t doinit = PTHREAD_ONCE_INIT;
 
   pthread_once (&doinit, etp_once_init);
 
-  memset (etp, 0, sizeof *etp);
+  want_poll_cb = want_poll;
+  done_poll_cb = done_poll;
+}
+
+X_THREAD_PROC (etp_proc);
+
+static void etp_start_thread (void)
+{
+  etp_worker *wrk = calloc (1, sizeof (etp_worker));
+
+  /*TODO*/
+  assert (("unable to allocate worker thread data", wrk));
+
+  X_LOCK (wrklock);
 
-  etp->want_poll_cb = want_poll;
-  etp->done_poll_cb = done_poll;
+  if (thread_create (&wrk->tid, etp_proc, (void *)wrk))
+    {
+      wrk->prev = &wrk_first;
+      wrk->next = wrk_first.next;
+      wrk_first.next->prev = wrk;
+      wrk_first.next = wrk;
+      ++started;
+    }
+  else
+    free (wrk);
+
+  X_UNLOCK (wrklock);
+}
+
+static void etp_maybe_start_thread (void)
+{
+  if (etp_nthreads () >= wanted)
+    return;
+  
+  /* todo: maybe use idle here, but might be less exact */
+  if (0 <= (int)etp_nthreads () + (int)etp_npending () - (int)etp_nreqs ())
+    return;
+
+  etp_start_thread ();
 }
 
-static etp_pool etp;
+static void etp_end_thread (void)
+{
+  eio_req *req = calloc (1, sizeof (eio_req));
+
+  req->type = -1;
+  req->pri  = ETP_PRI_MAX - ETP_PRI_MIN;
+
+  X_LOCK (reqlock);
+  reqq_push (&req_queue, req);
+  X_COND_SIGNAL (reqwait);
+  X_UNLOCK (reqlock);
+
+  X_LOCK (wrklock);
+  --started;
+  X_UNLOCK (wrklock);
+}
+
+static int etp_poll (void)
+{
+  unsigned int maxreqs;
+  unsigned int maxtime;
+  struct timeval tv_start, tv_now;
+
+  X_LOCK (reslock);
+  maxreqs = max_poll_reqs;
+  maxtime = max_poll_time;
+  X_UNLOCK (reslock);
+
+  if (maxtime)
+    gettimeofday (&tv_start, 0);
+
+  for (;;)
+    {
+      ETP_REQ *req;
+
+      etp_maybe_start_thread ();
+
+      X_LOCK (reslock);
+      req = reqq_shift (&res_queue);
+
+      if (req)
+        {
+          --npending;
+
+          if (!res_queue.size && done_poll_cb)
+            done_poll_cb ();
+        }
+
+      X_UNLOCK (reslock);
+
+      if (!req)
+        return 0;
+
+      X_LOCK (reqlock);
+      --nreqs;
+      X_UNLOCK (reqlock);
+
+      if (req->type == EIO_GROUP && req->size)
+        {
+          req->int1 = 1; /* mark request as delayed */
+          continue;
+        }
+      else
+        {
+          int res = ETP_FINISH (req);
+          if (res)
+            return res;
+        }
+
+      if (maxreqs && !--maxreqs)
+        break;
+
+      if (maxtime)
+        {
+          gettimeofday (&tv_now, 0);
+
+          if (tvdiff (&tv_start, &tv_now) >= maxtime)
+            break;
+        }
+    }
+
+  errno = EAGAIN;
+  return -1;
+}
+
+static void etp_cancel (ETP_REQ *req)
+{
+  X_LOCK   (wrklock);
+  req->flags |= EIO_FLAG_CANCELLED;
+  X_UNLOCK (wrklock);
+
+  eio_grp_cancel (req);
+}
+
+static void etp_submit (ETP_REQ *req)
+{
+  req->pri -= ETP_PRI_MIN;
+
+  if (req->pri < ETP_PRI_MIN - ETP_PRI_MIN) req->pri = ETP_PRI_MIN - ETP_PRI_MIN;
+  if (req->pri > ETP_PRI_MAX - ETP_PRI_MIN) req->pri = ETP_PRI_MAX - ETP_PRI_MIN;
+
+  X_LOCK (reqlock);
+  ++nreqs;
+  ++nready;
+  reqq_push (&req_queue, req);
+  X_COND_SIGNAL (reqwait);
+  X_UNLOCK (reqlock);
+
+  etp_maybe_start_thread ();
+}
+
+static void etp_set_max_poll_time (double nseconds)
+{
+  if (WORDACCESS_UNSAFE) X_LOCK   (reslock);
+  max_poll_time = nseconds;
+  if (WORDACCESS_UNSAFE) X_UNLOCK (reslock);
+}
+
+static void etp_set_max_poll_reqs (unsigned int maxreqs)
+{
+  if (WORDACCESS_UNSAFE) X_LOCK   (reslock);
+  max_poll_reqs = maxreqs;
+  if (WORDACCESS_UNSAFE) X_UNLOCK (reslock);
+}
+
+static void etp_set_max_idle (unsigned int nthreads)
+{
+  if (WORDACCESS_UNSAFE) X_LOCK   (reqlock);
+  max_idle = nthreads <= 0 ? 1 : nthreads;
+  if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
+}
+
+static void etp_set_min_parallel (unsigned int nthreads)
+{
+  if (wanted < nthreads)
+    wanted = nthreads;
+}
+
+static void etp_set_max_parallel (unsigned int nthreads)
+{
+  if (wanted > nthreads)
+    wanted = nthreads;
+
+  while (started > wanted)
+    etp_end_thread ();
+}
 
 /*****************************************************************************/
 
@@ -337,8 +580,6 @@ static void grp_try_feed (eio_req *grp)
     }
 }
 
-static int eio_finish (eio_req *req);
-
 static int grp_dec (eio_req *grp)
 {
   --grp->size;
@@ -396,178 +637,62 @@ void eio_grp_cancel (eio_req *grp)
 
 void eio_cancel (eio_req *req)
 {
-  X_LOCK   (etplock);
-  req->flags |= EIO_FLAG_CANCELLED;
-  X_UNLOCK (etplock);
-
-  eio_grp_cancel (req);
+  etp_cancel (req);
 }
 
-X_THREAD_PROC (eio_proc);
-
-static void start_thread (void)
+void eio_submit (eio_req *req)
 {
-  worker *wrk = calloc (1, sizeof (worker));
-
-  /*TODO*/
-  assert (("unable to allocate worker thread data", wrk));
-
-  X_LOCK (etplock);
-
-  if (thread_create (&wrk->tid, eio_proc, (void *)wrk))
-    {
-      wrk->prev = &wrk_first;
-      wrk->next = wrk_first.next;
-      wrk_first.next->prev = wrk;
-      wrk_first.next = wrk;
-      ++started;
-    }
-  else
-    free (wrk);
-
-  X_UNLOCK (etplock);
+  etp_submit (req);
 }
 
-static void maybe_start_thread (void)
+unsigned int eio_nreqs (void)
 {
-  if (eio_nthreads () >= wanted)
-    return;
-  
-  /* todo: maybe use idle here, but might be less exact */
-  if (0 <= (int)eio_nthreads () + (int)eio_npending () - (int)eio_nreqs ())
-    return;
-
-  start_thread ();
+  return etp_nreqs ();
 }
 
-void eio_submit (eio_req *req)
+unsigned int eio_nready (void)
 {
-  req->pri += EIO_PRI_BIAS;
-
-  if (req->pri < EIO_PRI_MIN + EIO_PRI_BIAS) req->pri = EIO_PRI_MIN + EIO_PRI_BIAS;
-  if (req->pri > EIO_PRI_MAX + EIO_PRI_BIAS) req->pri = EIO_PRI_MAX + EIO_PRI_BIAS;
-
-  ++nreqs;
-
-  X_LOCK (reqlock);
-  ++nready;
-  reqq_push (&req_queue, req);
-  X_COND_SIGNAL (reqwait);
-  X_UNLOCK (reqlock);
-
-  maybe_start_thread ();
+  return etp_nready ();
 }
 
-static void end_thread (void)
+unsigned int eio_npending (void)
 {
-  eio_req *req = calloc (1, sizeof (eio_req));
-
-  req->type = EIO_QUIT;
-  req->pri  = EIO_PRI_MAX + EIO_PRI_BIAS;
-
-  X_LOCK (reqlock);
-  reqq_push (&req_queue, req);
-  X_COND_SIGNAL (reqwait);
-  X_UNLOCK (reqlock);
+  return etp_npending ();
+}
 
-  X_LOCK (etplock);
-  --started;
-  X_UNLOCK (etplock);
+unsigned int eio_nthreads (void)
+{
+  return etp_nthreads ();
 }
 
 void eio_set_max_poll_time (double nseconds)
 {
-  if (WORDACCESS_UNSAFE) X_LOCK   (reqlock);
-  etp.max_poll_time = nseconds;
-  if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
+  etp_set_max_poll_time (nseconds);
 }
 
 void eio_set_max_poll_reqs (unsigned int maxreqs)
 {
-  if (WORDACCESS_UNSAFE) X_LOCK   (reqlock);
-  etp.max_poll_reqs = maxreqs;
-  if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
+  etp_set_max_poll_reqs (maxreqs);
 }
 
 void eio_set_max_idle (unsigned int nthreads)
 {
-  if (WORDACCESS_UNSAFE) X_LOCK   (reqlock);
-  max_idle = nthreads <= 0 ? 1 : nthreads;
-  if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
+  etp_set_max_idle (nthreads);
 }
 
 void eio_set_min_parallel (unsigned int nthreads)
 {
-  if (wanted < nthreads)
-    wanted = nthreads;
+  etp_set_min_parallel (nthreads);
 }
 
 void eio_set_max_parallel (unsigned int nthreads)
 {
-  if (wanted > nthreads)
-    wanted = nthreads;
-
-  while (started > wanted)
-    end_thread ();
+  etp_set_max_parallel (nthreads);
 }
 
 int eio_poll (void)
 {
-  int maxreqs = etp.max_poll_reqs;
-  struct timeval tv_start, tv_now;
-  eio_req *req;
-
-  if (etp.max_poll_time)
-    gettimeofday (&tv_start, 0);
-
-  for (;;)
-    {
-      maybe_start_thread ();
-
-      X_LOCK (reslock);
-      req = reqq_shift (&res_queue);
-
-      if (req)
-        {
-          --npending;
-
-          if (!res_queue.size && etp.done_poll_cb)
-            etp.done_poll_cb ();
-        }
-
-      X_UNLOCK (reslock);
-
-      if (!req)
-        return 0;
-
-      --nreqs;
-
-      if (req->type == EIO_GROUP && req->size)
-        {
-          req->int1 = 1; /* mark request as delayed */
-          continue;
-        }
-      else
-        {
-          int res = eio_finish (req);
-          if (res)
-            return res;
-        }
-
-      if (maxreqs && !--maxreqs)
-        break;
-
-      if (etp.max_poll_time)
-        {
-          gettimeofday (&tv_now, 0);
-
-          if (tvdiff (&tv_start, &tv_now) >= etp.max_poll_time)
-            break;
-        }
-    }
-
-  errno = EAGAIN;
-  return -1;
+  return etp_poll ();
 }
 
 /*****************************************************************************/
@@ -707,7 +832,7 @@ eio__readdir_r (DIR *dirp, EIO_STRUCT_DIRENT *ent, EIO_STRUCT_DIRENT **res)
 
 /* sendfile always needs emulation */
 static ssize_t
-eio__sendfile (int ofd, int ifd, off_t offset, size_t count, worker *self)
+eio__sendfile (int ofd, int ifd, off_t offset, size_t count, etp_worker *self)
 {
   ssize_t res;
 
@@ -801,7 +926,7 @@ eio__sendfile (int ofd, int ifd, off_t offset, size_t count, worker *self)
 
 /* read a full directory */
 static void
-eio__scandir (eio_req *req, worker *self)
+eio__scandir (eio_req *req, etp_worker *self)
 {
   DIR *dirp;
   union
@@ -815,12 +940,12 @@ eio__scandir (eio_req *req, worker *self)
   int memofs = 0;
   int res = 0;
 
-  X_LOCK (etplock);
+  X_LOCK (wrklock);
   self->dirp = dirp = opendir (req->ptr1);
   self->dbuf = u = malloc (sizeof (*u));
   req->flags |= EIO_FLAG_PTR2_FREE;
   req->ptr2 = names = malloc (memlen);
-  X_UNLOCK (etplock);
+  X_UNLOCK (wrklock);
 
   if (dirp && u && names)
     for (;;)
@@ -842,9 +967,9 @@ eio__scandir (eio_req *req, worker *self)
             while (memofs + len > memlen)
               {
                 memlen *= 2;
-                X_LOCK (etplock);
+                X_LOCK (wrklock);
                 req->ptr2 = names = realloc (names, memlen);
-                X_UNLOCK (etplock);
+                X_UNLOCK (wrklock);
 
                 if (!names)
                   break;
@@ -866,9 +991,9 @@ eio__scandir (eio_req *req, worker *self)
 #define ALLOC(len)				\
   if (!req->ptr2)				\
     {						\
-      X_LOCK (etplock);				\
+      X_LOCK (wrklock);				\
       req->flags |= EIO_FLAG_PTR2_FREE;		\
-      X_UNLOCK (etplock);			\
+      X_UNLOCK (wrklock);			\
       req->ptr2 = malloc (len);			\
       if (!req->ptr2)				\
         {					\
@@ -878,19 +1003,17 @@ eio__scandir (eio_req *req, worker *self)
         }					\
     }
 
-X_THREAD_PROC (eio_proc)
+X_THREAD_PROC (etp_proc)
 {
-  eio_req *req;
+  ETP_REQ *req;
   struct timespec ts;
-  worker *self = (worker *)thr_arg;
+  etp_worker *self = (etp_worker *)thr_arg;
 
   /* try to distribute timeouts somewhat randomly */
   ts.tv_nsec = ((unsigned long)self & 1023UL) * (1000000000UL / 1024UL);
 
   for (;;)
     {
-      ts.tv_sec  = time (0) + IDLE_TIMEOUT;
-
       X_LOCK (reqlock);
 
       for (;;)
@@ -902,21 +1025,21 @@ X_THREAD_PROC (eio_proc)
 
           ++idle;
 
+          ts.tv_sec = time (0) + IDLE_TIMEOUT;
           if (X_COND_TIMEDWAIT (reqwait, reqlock, ts) == ETIMEDOUT)
             {
               if (idle > max_idle)
                 {
                   --idle;
                   X_UNLOCK (reqlock);
-                  X_LOCK (etplock);
+                  X_LOCK (wrklock);
                   --started;
-                  X_UNLOCK (etplock);
+                  X_UNLOCK (wrklock);
                   goto quit;
                 }
 
               /* we are allowed to idle, so do so without any timeout */
               X_COND_WAIT (reqwait, reqlock);
-              ts.tv_sec  = time (0) + IDLE_TIMEOUT;
             }
 
           --idle;
@@ -1020,7 +1143,7 @@ X_THREAD_PROC (eio_proc)
               req->result = 0;
               break;
 
-            case EIO_QUIT:
+            case -1:
               goto quit;
 
             default:
@@ -1034,19 +1157,19 @@ X_THREAD_PROC (eio_proc)
 
       ++npending;
 
-      if (!reqq_push (&res_queue, req) && etp.want_poll_cb)
-        etp.want_poll_cb ();
+      if (!reqq_push (&res_queue, req) && want_poll_cb)
+        want_poll_cb ();
 
       self->req = 0;
-      worker_clear (self);
+      etp_worker_clear (self);
 
       X_UNLOCK (reslock);
     }
 
 quit:
-  X_LOCK (etplock);
-  worker_free (self);
-  X_UNLOCK (etplock);
+  X_LOCK (wrklock);
+  etp_worker_free (self);
+  X_UNLOCK (wrklock);
 
   return 0;
 }
@@ -1055,7 +1178,7 @@ quit:
 
 int eio_init (void (*want_poll)(void), void (*done_poll)(void))
 {
-  etp_init (&etp, want_poll, done_poll);
+  etp_init (want_poll, done_poll);
 }
 
 static void eio_api_destroy (eio_req *req)
@@ -1323,7 +1446,7 @@ void eio_grp_add (eio_req *grp, eio_req *req)
 
 ssize_t eio_sendfile_sync (int ofd, int ifd, off_t offset, size_t count)
 {
-  worker wrk;
+  etp_worker wrk;
 
   wrk.dbuf = 0;
 
diff --git a/eio.h b/eio.h
index a63490b..d08059f 100644
--- a/eio.h
+++ b/eio.h
@@ -1,3 +1,42 @@
+/*
+ * libeio API header
+ *
+ * Copyright (c) 2007,2008 Marc Alexander Lehmann <libeio@schmorp.de>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without modifica-
+ * tion, are permitted provided that the following conditions are met:
+ * 
+ *   1.  Redistributions of source code must retain the above copyright notice,
+ *       this list of conditions and the following disclaimer.
+ * 
+ *   2.  Redistributions in binary form must reproduce the above copyright
+ *       notice, this list of conditions and the following disclaimer in the
+ *       documentation and/or other materials provided with the distribution.
+ * 
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
+ * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO
+ * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
+ * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
+ * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH-
+ * ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
+ * OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * Alternatively, the contents of this file may be used under the terms of
+ * the GNU General Public License ("GPL") version 2 or any later version,
+ * in which case the provisions of the GPL are applicable instead of
+ * the above. If you wish to allow the use of your version of this file
+ * only under the terms of the GPL and not to allow others to use your
+ * version of this file under the BSD license, indicate your decision
+ * by deleting the provisions above and replace them with the notice
+ * and other provisions required by the GPL. If you do not delete the
+ * provisions above, a recipient may use your version of this file under
+ * either the BSD or the GPL.
+ */
+
 #ifndef EIO_H_
 #define EIO_H_
 
@@ -17,7 +56,6 @@ typedef int (*eio_cb)(eio_req *req);
 #endif
 
 enum {
-  EIO_QUIT,
   EIO_OPEN, EIO_CLOSE, EIO_DUP2,
   EIO_READ, EIO_WRITE,
   EIO_READAHEAD, EIO_SENDFILE,
@@ -40,7 +78,7 @@ typedef double eio_tstamp; /* feel free to use double in your code directly */
 /* this structure is mostly read-only */
 struct eio_req
 {
-  eio_req volatile *next; /* private */
+  eio_req volatile *next; /* private ETP */
 
   ssize_t result;  /* result of syscall, e.g. result = read (... */
   off_t offs;      /* read, write, truncate, readahead: file offset; mknod: dev_t */
@@ -50,7 +88,7 @@ struct eio_req
   eio_tstamp nv1;  /* utime, futime: atime; busy: sleep time */
   eio_tstamp nv2;  /* utime, futime: mtime */
 
-  int type;        /* EIO_xxx constant */
+  int type;        /* EIO_xxx constant ETP */
   int int1;        /* all applicable requests: file descriptor; sendfile: output fd; open: flags */
   long int2;       /* chown, fchown: uid; sendfile: input fd; open, chmod, mkdir, mknod: file mode */
   long int3;       /* chown, fchown: gid */
@@ -80,8 +118,6 @@ enum {
   EIO_PRI_MAX     =  4,
 
   EIO_PRI_DEFAULT = 0,
-  EIO_PRI_BIAS    = -EIO_PRI_MIN,
-  EIO_NUM_PRI     = EIO_PRI_MAX + EIO_PRI_BIAS + 1
 };
 
 /* returns < 0 on error, errno set