1 files changed, 139 insertions, 0 deletions
diff --git a/plugins/vcgn-plugin/vcgn/spp_timers.h b/plugins/vcgn-plugin/vcgn/spp_timers.h
new file mode 100644
index 00000000000..afb0147b2ed
--- /dev/null
+++ b/plugins/vcgn-plugin/vcgn/spp_timers.h
@@ -0,0 +1,139 @@
+/* 
+ *------------------------------------------------------------------
+ * spp_timers.h
+ *
+ * Copyright (c) 2008-2009 Cisco and/or its affiliates.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *------------------------------------------------------------------
+ */
+#ifndef __SPP_TIMERS_H__
+#define __SPP_TIMERS_H__
+
+
+typedef struct d_list_el_ {
+    struct d_list_el_ *next;
+    struct d_list_el_ *prev;
+} d_list_el_t;
+
+/*
+ * d_list_init
+ */
+
+static inline void d_list_init (d_list_el_t *headp)
+{
+    headp->prev = headp->next = headp;
+}
+
+/*
+ * d_list_init - add at head of list
+ */
+
+static inline void d_list_add_head (d_list_el_t *headp, 
+                                                  d_list_el_t *elp)
+{
+    ASSERT(elp->prev == elp);     /* multiple enqueue, BAD! */
+    ASSERT(elp->next == elp);
+
+    elp->next = headp->next;
+    headp->next = elp;
+    elp->prev = elp->next->prev;
+    elp->next->prev = elp;
+}
+
+/*
+ * d_list_add_tail - add element at tail of list
+ */
+static inline void d_list_add_tail (d_list_el_t *headp, 
+                                                  d_list_el_t *elp)
+{
+    ASSERT(elp->prev == elp);     /* multiple enqueue, BAD! */
+    ASSERT(elp->next == elp);
+
+    headp = headp->prev;
+
+    elp->next = headp->next;
+    headp->next = elp;
+    elp->prev = elp->next->prev;
+    elp->next->prev = elp;
+}
+
+/*
+ * d_list_rem_head - removes first element from list
+ */
+static inline d_list_el_t *d_list_rem_head (d_list_el_t *headp)
+{
+    d_list_el_t *elp;
+
+    elp = headp->next;
+    if (elp == headp)
+        return (NULL);
+    headp->next = elp->next;
+    elp->next->prev = elp->prev;
+
+    elp->next = elp->prev = elp;
+    return (elp);
+}
+
+/*
+ * d_list_rem_elem - removes specific element from list.
+ */
+static inline void d_list_rem_elem (d_list_el_t *elp)
+{
+    d_list_el_t *headp;
+
+    headp = elp->prev;
+
+    headp->next = elp->next;
+    elp->next->prev = elp->prev;
+    elp->next = elp->prev = elp;
+}
+
+#define TIMER_BKTS_PER_WHEEL	128 /* power of 2, please */
+#define TIMER_NWHEELS   	4
+
+typedef struct {
+    i32 curindex;               /* current index for this wheel */
+    d_list_el_t *bkts;          /* vector of bucket listheads */
+} spp_timer_wheel_t;
+
+
+typedef struct {
+    u64 next_run_ticks;         /* Next time we expire timers */
+    spp_timer_wheel_t **wheels; /* pointers to wheels */
+} spp_timer_axle_t;
+
+
+typedef struct {
+    d_list_el_t el;
+    u16 cb_index;
+    u16 flags;
+    u64 expires;
+} spp_timer_t;
+
+#define SPP_TIMER_RUNNING	0x0001
+
+
+/*
+ * prototypes
+ */
+void spp_timer_set_ticks_per_ms(u64);
+void spp_timer_axle_init (spp_timer_axle_t *ta);
+void spp_timer_expire(spp_timer_axle_t *ta, u64 now);
+void spp_timer_final_init(void);
+
+void spp_timer_start(spp_timer_t *tp);
+void spp_timer_start_axle(spp_timer_axle_t *ta, spp_timer_t *tp);
+void spp_timer_stop(spp_timer_t *tp);
+u16 spp_timer_register_callback (void (*fp)(spp_timer_t *));
+
+#endif /* __SPP_TIMERS_H__ */