src/pnacl_platform.nit

   1 # This file is part of NIT ( http://www.nitlanguage.org )
   2 #
   3 # Copyright 2014 Johan Kayser <kayser.johan@gmail.com>
   4 #
   5 # Licensed under the Apache License, Version 2.0 (the "License");
   6 # you may not use this file except in compliance with the License.
   7 # You may obtain a copy of the License at
   8 #
   9 #     http://www.apache.org/licenses/LICENSE-2.0
  10 #
  11 # Unless required by applicable law or agreed to in writing, software
  12 # distributed under the License is distributed on an "AS IS" BASIS,
  13 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  14 # See the License for the specific language governing permissions and
  15 # limitations under the License.
  16
  17 # Compile program for the PNaCl platform
  18 module pnacl_platform
  19
  20 import platform
  21 import abstract_compiler
  22
  23 redef class ToolContext
  24         redef fun platform_from_name(name)
  25         do
  26                 if name == "pnacl" then return new PnaclPlatform
  27                 return super
  28         end
  29 end
  30
  31 class PnaclPlatform
  32         super Platform
  33
  34         redef fun supports_libunwind do return false
  35
  36         redef fun no_main do return true
  37
  38         redef fun toolchain(toolcontext) do return new PnaclToolchain(toolcontext)
  39 end
  40
  41 class PnaclToolchain
  42         super MakefileToolchain
  43
  44         redef fun write_files(compiler, compile_dir, cfiles)
  45         do
  46                 var app_name = compiler.mainmodule.name
  47
  48                 # create compile_dir
  49                 var dir = compile_dir
  50                 if not dir.file_exists then dir.mkdir
  51
  52                 # compile normal C files
  53                 super(compiler, compile_dir, cfiles)
  54
  55                 # Gather extra C files generated elsewhere than in super
  56                 for f in compiler.extern_bodies do
  57                         if f isa ExternCFile then cfiles.add(f.filename.basename(""))
  58                 end
  59
  60                 # Outname
  61                 var outname = toolcontext.opt_output.value
  62                 if outname == null then outname = "{compiler.mainmodule.name}"
  63
  64                 ## Generate makefile
  65                 var file = "{dir}/Makefile"
  66                 """
  67 # This file was generated by Nit, any modification will be lost.
  68
  69 # Get pepper directory for toolchain and includes.
  70 #
  71 # If NACL_SDK_ROOT is not set, then assume it can be found five directories up.
  72 #
  73 THIS_MAKEFILE := $(abspath $(lastword $(MAKEFILE_LIST)))
  74 NACL_SDK_ROOT ?= $(abspath $(dir $(THIS_MAKEFILE))../../../..)
  75
  76 # Project Build flags
  77 WARNINGS := -Wall -pedantic -Werror -Wno-long-long -Wno-unused-value -Wno-unused-label -Wno-duplicate-decl-specifier -Wno-switch -Wno-embedded-directive
  78 CXXFLAGS := -pthread $(WARNINGS)
  79
  80 #
  81 # Compute tool paths
  82 #
  83 GETOS := python $(NACL_SDK_ROOT)/tools/getos.py
  84 OSHELPERS = python $(NACL_SDK_ROOT)/tools/oshelpers.py
  85 OSNAME := $(shell $(GETOS))
  86
  87 PNACL_TC_PATH := $(abspath $(NACL_SDK_ROOT)/toolchain/$(OSNAME)_pnacl)
  88 PNACL_CXX := $(PNACL_TC_PATH)/bin/pnacl-clang
  89 PNACL_FINALIZE := $(PNACL_TC_PATH)/bin/pnacl-finalize
  90 CXXFLAGS += -I$(NACL_SDK_ROOT)/include
  91 LDFLAGS := -L$(NACL_SDK_ROOT)/lib/pnacl/Release -lppapi_cpp -lppapi
  92
  93 #
  94 # Disable DOS PATH warning when using Cygwin based tools Windows
  95 #
  96 CYGWIN ?= nodosfilewarning
  97 export CYGWIN
  98
  99 # Declare the ALL target first, to make the 'all' target the default build
 100 all: ../{{{outname}}}/{{{app_name}}}.pexe
 101
 102 {{{app_name}}}.pexe: src/{{{cfiles.join(" src/")}}}
 103         $(PNACL_CXX) -o $@ $^ -g -O0 $(CXXFLAGS) $(LDFLAGS) # For Debug
 104         # $(PNACL_CXX) -o $@ $^ -O3 $(CXXFLAGS) $(LDFLAGS) # For Release
 105
 106 ../{{{outname}}}/{{{app_name}}}.pexe: {{{app_name}}}.pexe
 107         $(PNACL_FINALIZE) -o $@ $<
 108                 """.write_to_file(file)
 109
 110                 ### generate the minimal index.html
 111                 if not outname.file_exists then outname.mkdir
 112                 file = "{outname}/index.html"
 113
 114                 if not file.file_exists then """
 115 <!DOCTYPE html>
 116 <html>
 117   <!--
 118   This file was generated by Nit, any modification will be lost.
 119   -->
 120 <head>
 121         <title>{{{app_name}}}</title>
 122         <script src="js/pnacl_js.js"></script>
 123 </head>
 124 <body onload="pageDidLoad()">
 125         <h1>PNaCl : Minimal HTML for {{{app_name}}}</h1>
 126         <p>
 127   <!--
 128   Load the published pexe.
 129   Note: Since this module does not use any real-estate in the browser, its
 130   width and height are set to 0.
 131
 132   Note: The <embed> element is wrapped inside a <div>, which has both a 'load'
 133   and a 'message' event listener attached.  This wrapping method is used
 134   instead of attaching the event listeners directly to the <embed> element to
 135   ensure that the listeners are active before the NaCl module 'load' event
 136   fires.  This also allows you to use PPB_Messaging.PostMessage() (in C) or
 137   pp::Instance.PostMessage() (in C++) from within the initialization code in
 138   your module.
 139   -->
 140                 <div id="listener">
 141                         <script type="text/javascript">
 142                                 var listener = document.getElementById('listener');
 143                                 listener.addEventListener('load', moduleDidLoad, true);
 144                                 listener.addEventListener('message', handleMessage, true);
 145                         </script>
 146
 147                         <embed id="{{{app_name}}}"
 148                                 width=0 height=0
 149                                 src="{{{app_name}}}.nmf"
 150                                 type="application/x-pnacl" />
 151                 </div>
 152                 </p>
 153                 <h2>Status <code id="statusField">NO-STATUS</code></h2>
 154 </body>
 155 </html>
 156                 """.write_to_file(file)
 157
 158                 ### generate pnacl_js.js in a folder named 'js'
 159                 dir = "{outname}/js/"
 160                 if not dir.file_exists then dir.mkdir
 161                 file = "{dir}/pnacl_js.js"
 162                 if not file.file_exists then """
 163 // This file was generated by Nit, any modification will be lost.
 164
 165 {{{app_name}}}Module = null;  // Global application object.
 166 statusText = 'NO-STATUS';
 167
 168 // Indicate load success.
 169 function moduleDidLoad() {
 170         {{{app_name}}}Module = document.getElementById('{{{app_name}}}');
 171         updateStatus('SUCCESS');
 172         // Send a message to the Native Client module like that
 173         //{{{app_name}}}Module.postMessage('Hello World');
 174 }
 175
 176 // The 'message' event handler.  This handler is fired when the NaCl module
 177 // posts a message to the browser by calling PPB_Messaging.PostMessage()
 178 // (in C) or pp::Instance.PostMessage() (in C++).  This implementation
 179 // simply displays the content of the message in an alert panel.
 180 function handleMessage(message_event) {
 181         console.log(message_event.data);
 182 }
 183
 184 // If the page loads before the Native Client module loads, then set the
 185 // status message indicating that the module is still loading.  Otherwise,
 186 // do not change the status message.
 187 function pageDidLoad() {
 188         if ({{{app_name}}}Module == null) {
 189                 updateStatus('LOADING...');
 190         } else {
 191                 // It's possible that the Native Client module onload event fired
 192                 // before the page's onload event.  In this case, the status message
 193                 // will reflect 'SUCCESS', but won't be displayed.  This call will
 194                 // display the current message.
 195                 updateStatus();
 196         }
 197 }
 198
 199 // Set the global status message.  If the element with id 'statusField'
 200 // exists, then set its HTML to the status message as well.
 201 // opt_message The message test.  If this is null or undefined, then
 202 // attempt to set the element with id 'statusField' to the value of
 203 // |statusText|.
 204 function updateStatus(opt_message) {
 205         if (opt_message)
 206                 statusText = opt_message;
 207         var statusField = document.getElementById('statusField');
 208         if (statusField) {
 209                 statusField.innerHTML = statusText;
 210         }
 211 }
 212                 """.write_to_file(file)
 213
 214                 ### generate the manifest file : app_name.nmf
 215                 # used to point the HTML to the Native Client module
 216                 # and optionally provide additional commands to the PNaCl translator in Chrome
 217                 file = "{outname}/{app_name}.nmf"
 218                 """
 219 {
 220         "program": {
 221                 "portable": {
 222                         "pnacl-translate": {
 223                                 "url": "{{{app_name}}}.pexe"
 224                         }
 225                 }
 226         }
 227 }
 228                 """.write_to_file(file)
 229         end
 230
 231         redef fun write_makefile(compiler, compile_dir, cfiles)
 232         do
 233                 # Do nothing, already done in `write_files`
 234         end
 235
 236         redef fun compile_c_code(compiler, compile_dir)
 237         do
 238                 # Generate the pexe
 239                 toolcontext.exec_and_check(["make", "-C", compile_dir], "PNaCl project error")
 240         end
 241 end