Use HAVE_PTHREAD_H -- conditionally have POSIX mutex.

src/specks.h

@@ -13,6 +13,8 @@
 extern "C" {
 #endif
 
+#include "config.h"
+
 #ifdef __APPLE__
 #include <OpenGL/gl.h>
 #else
@@ -31,7 +33,9 @@ extern "C" {
 #include "textures.h"
 #include "sclock.h"
 
+#ifdef HAVE_PTHREAD_H
 #include <pthread.h>
+#endif /*HAVE_PTHREAD_H*/
 
 #include <stdio.h>
 
@@ -232,17 +236,15 @@ enum FadeType {
      F_SPHERICAL, F_PLANAR, F_CONSTANT, F_LINEAR, F_LREGION, F_KNEE2, F_KNEE12
 };
 
-typedef struct threader {
-    struct threader *next;
-    char *name;
-    pthread_t thread;
-    int enabled;
-    struct stuff *st;
-    int (*notify)( struct threader *, struct stuff *, void * );
-    void *data;
-} ThReader;
-
-
+/* async reader ops:
+ *  lock, unlock shared data (by reader and main)
+ *  pause, resume thread (wait on condition variable) (by main)
+ *  cancel read (by main)
+ *  set memory budget (by main)
+ *  notify of change of timespan or whatever (by reader)
+ *  import data (by reader)
+ *  purge data (by reader)
+ */  
 
 typedef struct dyndata {
     int enabled;
@@ -269,8 +271,10 @@ struct stuff {
   struct specklist *sl;	/* Current display = anima[curdata][curtime] */
 
 	/* shared with possible reader threads: */
-  pthread_mutex_t smut;
   struct specklist **anima[MAXFILES];	/* anima[ndata][ntimes]: All data.  Shared with reader threads. */
+#ifdef HAVE_PTHREAD_H
+  pthread_mutex_t smut;
+#endif
 
   char dataname[MAXFILES][12];
   int ntimes, ndata;
@@ -512,11 +516,13 @@ extern void  specks_current_frame( struct stuff *, struct specklist *sl );
 extern void  specks_reupdate( struct stuff *, struct specklist *sl );
 extern void  specks_datawait( struct stuff * );
 
+extern void  specks_lock_init( struct stuff * );
 extern void  specks_lock( struct stuff * );
 extern void  specks_unlock( struct stuff * );
 
 	/* uses locking: */
 extern struct specklist * specks_timespecks( struct stuff *, int dataset, int timestep );
+extern void specks_ensuretime( struct stuff *, int dataset, int timestep );
 extern void specks_insertspecks( struct stuff *, int dataset, int timestep, struct specklist * );
 extern void specks_clearspecks( struct stuff *, int dataset, int timestep );