62 	struct tcp_send_buffer *buf;  in SBInit()  local
65 	buf = SBDequeue(sbm->freeq);  in SBInit()
66 	if (!buf) {  in SBInit()
67 		buf = (struct tcp_send_buffer *)malloc(sizeof(struct tcp_send_buffer));  in SBInit()
68 		if (!buf) {  in SBInit()
72 		buf->data = MPAllocateChunk(sbm->mp);  in SBInit()
73 		if (!buf->data) {  in SBInit()
75 			free(buf);  in SBInit()
81 	buf->head = buf->data;  in SBInit()
83 	buf->head_off = buf->tail_off = 0;  in SBInit()
84 	buf->len = buf->cum_len = 0;  in SBInit()
85 	buf->size = sbm->chunk_size;  in SBInit()
87 	buf->init_seq = buf->head_seq = init_seq;  in SBInit()
89 	return buf;  in SBInit()
93 SBFree(sb_manager_t sbm, struct tcp_send_buffer *buf)  in SBFree()  argument
95 	if (!buf)  in SBFree()
98 	SBEnqueue(sbm->freeq, buf);  in SBFree()
102 SBPut(sb_manager_t sbm, struct tcp_send_buffer *buf, const void *data, size_t len)  in SBPut()  argument
110 	to_put = MIN(len, buf->size - buf->len);  in SBPut()
115 	if (buf->tail_off + to_put < buf->size) {  in SBPut()
117 		memcpy(buf->data + buf->tail_off, data, to_put);  in SBPut()
118 		buf->tail_off += to_put;  in SBPut()
121 		memmove(buf->data, buf->head, buf->len);  in SBPut()
122 		buf->head = buf->data;  in SBPut()
123 		buf->head_off = 0;  in SBPut()
124 		memcpy(buf->head + buf->len, data, to_put);  in SBPut()
125 		buf->tail_off = buf->len + to_put;  in SBPut()
127 	buf->len += to_put;  in SBPut()
128 	buf->cum_len += to_put;  in SBPut()
134 SBRemove(sb_manager_t sbm, struct tcp_send_buffer *buf, size_t len)  in SBRemove()  argument
141 	to_remove = MIN(len, buf->len);  in SBRemove()
146 	buf->head_off += to_remove;  in SBRemove()
147 	buf->head = buf->data + buf->head_off;  in SBRemove()
148 	buf->head_seq += to_remove;  in SBRemove()
149 	buf->len -= to_remove;  in SBRemove()
152 	if (buf->len == 0 && buf->head_off > 0) {  in SBRemove()
153 		buf->head = buf->data;  in SBRemove()
154 		buf->head_off = buf->tail_off = 0;  in SBRemove()