Changeset 68a552f in mainline for uspace/lib/c/generic/io/console.c

Timestamp:

2021-02-22T19:52:08Z (4 years ago)

Author:

Jiri Svoboda <jiri@…>

Branches:

lfn, master, serial, ticket/834-toolchain-update, topic/msim-upgrade, topic/simplify-dev-export

Children:

26853ebc

Parents:

2ab8ab3

Message:

Efficient way of rendering to the console via shared buffer

Makes congfx reasonably fast

File:

• uspace/lib/c/generic/io/console.c (modified) (3 diffs)

uspace/lib/c/generic/io/console.c

@@ -1 +1 @@
 /*
+ * Copyright (c) 2021 Jiri Svoboda
  * Copyright (c) 2006 Josef Cejka
  * Copyright (c) 2006 Jakub Vana
- * Copyright (c) 2008 Jiri Svoboda
  * All rights reserved.
  *
@@ -35 +35 @@
  */
 
+#include <as.h>
 #include <libc.h>
 #include <async.h>
@@ -264 +265 @@
 }
 
+/** Create a shared buffer for fast rendering to the console.
+ *
+ * @param ctrl Console
+ * @param cols Number of columns
+ * @param rows Number of rows
+ * @param rbuf Place to store pointer to the shared buffer
+ * @return EOK on success or an error code
+ */
+errno_t console_map(console_ctrl_t *ctrl, sysarg_t cols, sysarg_t rows,
+    charfield_t **rbuf)
+{
+        async_exch_t *exch = NULL;
+        void *buf;
+        aid_t req;
+        ipc_call_t answer;
+        size_t asize;
+        errno_t rc;
+
+        exch = async_exchange_begin(ctrl->output_sess);
+        req = async_send_2(exch, CONSOLE_MAP, cols, rows, &answer);
+        if (rc != EOK)
+                goto error;
+
+        asize = PAGES2SIZE(SIZE2PAGES(cols * rows * sizeof(charfield_t)));
+
+        rc = async_share_in_start_0_0(exch, asize, &buf);
+        if (rc != EOK) {
+                async_forget(req);
+                goto error;
+        }
+
+        async_exchange_end(exch);
+        exch = NULL;
+
+        async_wait_for(req, &rc);
+        if (rc != EOK)
+                goto error;
+
+        *rbuf = (charfield_t *)buf;
+        return EOK;
+error:
+        if (exch != NULL)
+                async_exchange_end(exch);
+        return rc;
+}
+
+/** Unmap console shared buffer.
+ *
+ * @param ctrl Console
+ * @param buf Buffer
+ */
+void console_unmap(console_ctrl_t *ctrl, charfield_t *buf)
+{
+        as_area_destroy(buf);
+}
+
+/** Update console rectangle from shared buffer.
+ *
+ * @param ctrl Console
+ * @param c0 Column coordinate of top-left corner (inclusive)
+ * @param r0 Row coordinate of top-left corner (inclusive)
+ * @param c1 Column coordinate of bottom-right corner (exclusive)
+ * @param r1 Row coordinate of bottom-right corner (exclusive)
+ *
+ * @return EOK on sucess or an error code
+ */
+errno_t console_update(console_ctrl_t *ctrl, sysarg_t c0, sysarg_t r0,
+    sysarg_t c1, sysarg_t r1)
+{
+        async_exch_t *exch = async_exchange_begin(ctrl->output_sess);
+        errno_t rc = async_req_4_0(exch, CONSOLE_UPDATE, c0, r0, c1, r1);
+        async_exchange_end(exch);
+
+        return rc;
+}
+
 /** @}
  */