1 files changed, 66 insertions, 0 deletions
diff --git a/tex/context/base/mkiv/node-snp.lua b/tex/context/base/mkiv/node-snp.lua
new file mode 100644
index 000000000..31c7771ac
--- /dev/null
+++ b/tex/context/base/mkiv/node-snp.lua
@@ -0,0 +1,66 @@
+if not modules then modules = { } end modules ['node-snp'] = {
+    version   = 1.001,
+    comment   = "companion to node-ini.mkiv",
+    author    = "Hans Hagen, PRAGMA-ADE, Hasselt NL",
+    copyright = "PRAGMA ADE / ConTeXt Development Team",
+    license   = "see context related readme files"
+}
+
+if not nodes then
+    nodes = { } -- also loaded in mtx-timing
+end
+
+local snapshots  = { }
+nodes.snapshots  = snapshots
+
+local nodeusage  = nodes.pool and nodes.pool.usage
+local clock      = os.gettimeofday or os.clock -- should go in environment
+local lasttime   = clock()
+local samples    = { }
+
+local parameters = {
+    "cs_count",
+    "dyn_used",
+    "elapsed_time",
+    "luabytecode_bytes",
+    "luastate_bytes",
+    "max_buf_stack",
+    "obj_ptr",
+    "pdf_mem_ptr",
+    "pdf_mem_size",
+    "pdf_os_cntr",
+--  "pool_ptr", -- obsolete
+    "str_ptr",
+}
+
+function snapshots.takesample(comment)
+    if nodeusage then
+        local c = clock()
+        local t = {
+            elapsed_time = c - lasttime,
+            node_memory  = nodeusage(),
+            comment      = comment,
+        }
+        for i=1,#parameters do
+            local parameter = parameters[i]
+            local ps = status[parameter]
+            if ps then
+                t[parameter] = ps
+            end
+        end
+        samples[#samples+1] = t
+        lasttime = c
+    end
+end
+
+function snapshots.getsamples()
+    return samples -- one return value !
+end
+
+function snapshots.resetsamples()
+    samples = { }
+end
+
+function snapshots.getparameters()
+    return parameters
+end