From 6c4518011906b8b2025de0dbc6b592915ee4f8db Mon Sep 17 00:00:00 2001
From: XeonSquared <redtailedairways@gmail.com>
Date: Sun, 28 Jul 2019 19:09:12 +1000
Subject: [PATCH] wrote a more flexible terminal creation system

---
 build.sh               |  2 +-
 module/dispmanager.lua | 52 ++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 53 insertions(+), 1 deletion(-)
 create mode 100644 module/dispmanager.lua

diff --git a/build.sh b/build.sh
index 752efce..c9ef01b 100755
--- a/build.sh
+++ b/build.sh
@@ -1,7 +1,7 @@
 #!/usr/bin/env bash
 mkdir build
 cd module
-cat sched.lua syslog.lua vt100.lua fs.lua iofs.lua loadfile.lua vt-task.lua io.lua createterms.lua init.lua > ../build/psychos.lua
+cat sched.lua syslog.lua vt100.lua fs.lua iofs.lua loadfile.lua vt-task.lua io.lua dispmanager.lua init.lua > ../build/psychos.lua
 cd ..
 echo '_OSVERSION="PsychOS 2.0a0"' >> build/*
 echo sched\(\) >> build/*
diff --git a/module/dispmanager.lua b/module/dispmanager.lua
new file mode 100644
index 0000000..3ef5f05
--- /dev/null
+++ b/module/dispmanager.lua
@@ -0,0 +1,52 @@
+do
+local tG,ttyn = {}, 0
+
+local function checkUnused(addr) -- returns false if a screen *addr* is already allocated to a GPU
+ for k,v in pairs(tG) do
+  if v == addr then
+   return false
+  end
+ end
+ return true
+end
+local function findNextDisplay() -- finds the next available screen, or nil if there are no available screens
+ for a,_ in component.list("screen") do
+  if checkUnused(a) then
+   return a
+  end
+ end
+ return nil
+end
+
+for file in ipairs(fs.list("/boot/cfg/disp/")) do -- allows files in /boot/cfg/disp with filenames as GPU addresses to bind to specific screens
+ if component.proxy(file) then
+  local f = io.open("/boot/cfg/disp/"..file)
+  if f then
+   local sA = file:read()
+   if checkUnused(sA) then
+    tG[file] = sA
+   end
+   f:close()
+  end
+ end
+end
+
+for a,_ in component.list("gpu") do -- allocate a screen to every unused GPU
+ tG[a] = findNextDisplay()
+end
+
+for gpu,screen in pairs(tG) do
+ dprint(gpu,screen)
+ local r,w = vtemu(gpu,screen)
+ iofs.register("tty"..tostring(ttyn),function() return r,w,function() w("\27[2J\27[H") end end)
+ local f = io.open("/iofs/tty"..tostring(ttyn),"rw")
+ fd[f.fd].t = "t"
+ ttyn = ttyn + 1
+end
+do
+ iofs.register("syslog",function() return function() return "" end, function(msg) syslog(msg,nil,tTasks[cPid].n) end, function() return true end end)
+end
+if #fd < 1 then
+ io.open("/iofs/syslog","rw")
+end
+end