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1 #pragma once
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2 #include <SDK/main_thread_callback.h>
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3
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4 // ======================================================================================================
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5 // Obsolete helpers - they still work, but it's easier to just use fb2k::inMainThread().
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6 // ======================================================================================================
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7
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8
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9 // Proxy class - friend this to allow callInMainThread to access your private methods
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10 class callInMainThread {
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11 public:
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12 template<typename host_t, typename param_t>
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13 static void callThis(host_t * host, param_t & param) {
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14 host->inMainThread(param);
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15 }
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16 template<typename host_t>
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17 static void callThis( host_t * host ) {
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18 host->inMainThread();
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19 }
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20 };
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21
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22 // Internal class, do not use.
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23 template<typename service_t, typename param_t>
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24 class _callInMainThreadSvc_t : public main_thread_callback {
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25 public:
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26 _callInMainThreadSvc_t(service_t * host, param_t const & param) : m_host(host), m_param(param) {}
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27 void callback_run() {
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28 callInMainThread::callThis(m_host.get_ptr(), m_param);
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29 }
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30 private:
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31 service_ptr_t<service_t> m_host;
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32 param_t m_param;
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33 };
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34
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35
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36 // Main thread callback helper. You can use this to easily invoke inMainThread(someparam) on your class without writing any wrapper code.
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37 // Requires myservice_t to be a fb2k service class with reference counting.
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38 template<typename myservice_t, typename param_t>
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39 static void callInMainThreadSvc(myservice_t * host, param_t const & param) {
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40 typedef _callInMainThreadSvc_t<myservice_t, param_t> impl_t;
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41 service_ptr_t<impl_t> obj = new service_impl_t<impl_t>(host, param);
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42 main_thread_callback_manager::get()->add_callback( obj );
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43 }
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44
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45 //! Helper class to call methods of your class (host class) in main thread with convenience. \n
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46 //! Deals with the otherwise ugly scenario of your class becoming invalid while a method is queued. \n
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47 //! Have this as a member of your class, then use m_mthelper.add( this, somearg ) ; to defer a call to this->inMainThread(somearg). \n
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48 //! If your class becomes invalid before inMainThread is executed, the pending callback is discarded. \n
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49 //! You can optionally call shutdown() to invalidate all pending callbacks early (in a destructor of your class - without waiting for callInMainThreadHelper destructor to do the job. \n
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50 //! In order to let callInMainThreadHelper access your private methods, declare friend class callInMainThread. \n
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51 //! Note that callInMainThreadHelper is expected to be created and destroyed in main thread.
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52 class callInMainThreadHelper {
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53 public:
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54
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55 typedef std::function< void () > func_t;
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56
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57 typedef pfc::rcptr_t< bool > killswitch_t;
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58
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59 class entryFunc : public main_thread_callback {
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60 public:
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61 entryFunc( func_t const & func, killswitch_t ks ) : m_ks(ks), m_func(func) {}
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62
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63 void callback_run() {
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64 if (!*m_ks) m_func();
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65 }
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66
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67 private:
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68 killswitch_t m_ks;
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69 func_t m_func;
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70 };
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71
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72 template<typename host_t, typename arg_t>
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73 class entry : public main_thread_callback {
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74 public:
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75 entry( host_t * host, arg_t const & arg, killswitch_t ks ) : m_ks(ks), m_host(host), m_arg(arg) {}
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76 void callback_run() {
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77 if (!*m_ks) callInMainThread::callThis( m_host, m_arg );
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78 }
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79 private:
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80 killswitch_t m_ks;
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81 host_t * m_host;
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82 arg_t m_arg;
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83 };
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84 template<typename host_t>
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85 class entryVoid : public main_thread_callback {
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86 public:
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87 entryVoid( host_t * host, killswitch_t ks ) : m_ks(ks), m_host(host) {}
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88 void callback_run() {
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89 if (!*m_ks) callInMainThread::callThis( m_host );
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90 }
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91 private:
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92 killswitch_t m_ks;
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93 host_t * m_host;
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94 };
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95
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96 void add(func_t f) {
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97 add_( new service_impl_t< entryFunc > ( f, m_ks ) );
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98 }
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99
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100 template<typename host_t, typename arg_t>
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101 void add( host_t * host, arg_t const & arg) {
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102 add_( new service_impl_t< entry<host_t, arg_t> >( host, arg, m_ks ) );
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103 }
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104 template<typename host_t>
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105 void add( host_t * host ) {
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106 add_( new service_impl_t< entryVoid<host_t> >( host, m_ks ) );
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107 }
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108 void add_( main_thread_callback::ptr cb ) {
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109 main_thread_callback_add( cb );
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110 }
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111
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112 callInMainThreadHelper() {
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113 m_ks.new_t();
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114 * m_ks = false;
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115 }
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116 void shutdown() {
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117 PFC_ASSERT( core_api::is_main_thread() );
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118 * m_ks = true;
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119 }
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120 ~callInMainThreadHelper() {
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121 shutdown();
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122 }
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123
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124 private:
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125 killswitch_t m_ks;
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126
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127 };
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