work in progress

[nbds] / runtime / runtime.c

diff --git a/runtime/runtime.c b/runtime/runtime.c
index fe4a1bd894a6dc09d776ffbbb8276d1f7ce2605f..19024e2f389f237ecbd6f0e2edf906b0b198a1d2 100644 (file)
--- a/runtime/runtime.c
+++ b/runtime/runtime.c
@@ -2,7 +2,6 @@
  * Written by Josh Dybnis and released to the public domain, as explained at
  * http://creativecommons.org/licenses/publicdomain
  */
-#define _POSIX_C_SOURCE 1 // for rand_r()
 #include <stdlib.h>
 #include <pthread.h>
 #include "common.h"
@@ -11,84 +10,26 @@
 #include "mem.h"
 #include "tls.h"
 
-DECLARE_THREAD_LOCAL(tid_, int);
-DECLARE_THREAD_LOCAL(rx_, uint32_t);
-DECLARE_THREAD_LOCAL(ry_, uint32_t);
-DECLARE_THREAD_LOCAL(rz_, uint32_t);
-DECLARE_THREAD_LOCAL(rc_, uint32_t);
+DECLARE_THREAD_LOCAL(ThreadId, int);
+static int ThreadIndex
 
-typedef struct thread_info {
-    int thread_id;
-    void *(*start_routine)(void *);
-    void *restrict arg;
-} thread_info_t;
+static int MaxThreadId = 0;
 
 __attribute__ ((constructor)) void nbd_init (void) {
-    INIT_THREAD_LOCAL(r);
-    INIT_THREAD_LOCAL(tid_);
-    SET_THREAD_LOCAL(tid_, 0);
+    rnd_init();
     mem_init();
-    lwt_thread_init(0);
-    rcu_thread_init(0);
-    srand((uint32_t)rdtsc());
 }
 
-static void *worker (void *arg) {
-    thread_info_t *ti = (thread_info_t *)arg;
-    SET_THREAD_LOCAL(tid_, ti->thread_id);
-    LOCALIZE_THREAD_LOCAL(tid_, int);
+void nbd_thread_init (void) {
+    LOCALIZE_THREAD_LOCAL(ThreadId, int);
 
-    SET_THREAD_LOCAL(rx_, rand());
-    SET_THREAD_LOCAL(ry_, rand());
-    SET_THREAD_LOCAL(rz_, rand());
-    SET_THREAD_LOCAL(rc_, rand());
+    if (ThreadId == 0) {
+        ++MaxThreadId; // TODO: reuse thread id's of threads that have been destroyed
+        ASSERT(MaxThreadId <= MAX_NUM_THREADS);
+        SET_THREAD_LOCAL(ThreadId, MaxThreadId);
+        rnd_thread_init();
+    } 
 
-    lwt_thread_init(ti->thread_id);
-    rcu_thread_init(ti->thread_id);
-
-    void *ret = ti->start_routine(ti->arg);
-    nbd_free(ti);
-    return ret;
-}
-
-int nbd_thread_create (pthread_t *restrict thread, int thread_id, void *(*start_routine)(void *), void *restrict arg) {
-    thread_info_t *ti = (thread_info_t *)nbd_malloc(sizeof(thread_info_t));
-    ti->thread_id = thread_id;
-    ti->start_routine = start_routine;
-    ti->arg = arg;
-    return pthread_create(thread, NULL, worker, ti);
-}
-
-// George Marsaglia's KISS generator
-uint64_t nbd_rand (void) {
-    LOCALIZE_THREAD_LOCAL(rx_, unsigned);
-    LOCALIZE_THREAD_LOCAL(ry_, unsigned);
-    LOCALIZE_THREAD_LOCAL(rz_, unsigned);
-    LOCALIZE_THREAD_LOCAL(rc_, unsigned);
-
-    uint32_t rx = 69069 * rx_ + 12345;
-    uint32_t ry = ry_;
-    uint32_t rz = rz_;
-    ry ^= (ry << 13);
-    ry ^= (ry >> 17);
-    ry ^= (ry <<  5);
-    uint64_t t = rz * 698769069LL + rc_;
-    uint64_t r = rx + ry + (rz = t);
-
-    SET_THREAD_LOCAL(rx_, rx);
-    SET_THREAD_LOCAL(ry_, ry);
-    SET_THREAD_LOCAL(rz_, rz);
-    SET_THREAD_LOCAL(rc_, t >> 32);
-
-    return r;
-}
-
-// Fairly fast random numbers
-uint64_t nbd_rand_seed (int i) {
-    return rdtsc() + -715159705 + i * 129;
-}
-
-int nbd_next_rand (uint64_t *r) {
-    *r = (*r * 0x5DEECE66DLL + 0xBLL) & MASK(48);
-    return (*r >> 17) & 0x7FFFFFFF;
+    lwt_thread_init();
+    rcu_thread_init();
 }