annotate framework/env/execute/chunk.lua @ 343:34bf5f7abe0d
Code cleanup in extos.c: use 1.0e9 instead of 0.000000001 to avoid floating-point inaccuracies, added "const" qualifiers to avoid two compiler warnings
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jbe |
| date |
Thu Mar 26 01:56:10 2015 +0100 (2015-03-26) |
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ba68ef9e7c90 |
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line source |
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poelzi@31
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1 --[[--
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jbe@46
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2 return_value = -- return value of executed chunk
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jbe@46
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3 execute.chunk{
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4 file_path = file_path, -- path to a Lua source or byte-code file
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5 app = app, -- app name to use or the current will be used
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6 module = module, -- module where chunk is located
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7 chunk = chunk -- name of chunk (filename without .lua extension)
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8 id = id, -- id to be returned by param.get_id(...) during execution
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9 params = params -- parameters to be returned by param.get(...) during execution
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10 }
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11
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12 This function loads and executes a lua file specified by a given path or constructs a path to load from the module and chunk name. A chunk name should always begin with an underscore. All return values of the loaded and executed chunk are returned by this function as well.
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13
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14 --]]--
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15
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16 local function pack_return_values(...)
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17 local storage = {...}
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18 storage.n = select("#", ...)
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19 return storage
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20 end
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21
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22 local function unpack_return_values(storage)
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23 return table.unpack(storage, 1, storage.n)
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24 end
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25
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26 function execute.chunk(args)
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27 local file_path = args.file_path
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28 local app = args.app or WEBMCP_APP_NAME
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29 local module = args.module
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30 local chunk = args.chunk
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31 local id = args.id
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32 local params = args.params
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33
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jbe@46
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34 file_path = file_path or encode.file_path(
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jbe@206
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35 WEBMCP_BASE_PATH, 'app', app, module, chunk .. '.lua'
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jbe@46
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36 )
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37
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38 local func = assert(loadcached(file_path))
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39
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40 if id or params then
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41 param.exchange(id, params)
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42 end
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43
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44 local result = pack_return_values(func())
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45
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46 if id or params then
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47 param.restore()
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48 end
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49
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50 return unpack_return_values(result)
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51 end
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