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Fix FREESCALE_EDMA_NBYTES_MLOFFYES_MLOFF() so it works with negative offsets.
author vae
date Wed, 29 Apr 2015 23:31:48 +0000
parents 74dbf4c3f2e1
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 #ifndef CYGONCE_KERNEL_MEMPOOLT_INL
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2 #define CYGONCE_KERNEL_MEMPOOLT_INL
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3
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4 //==========================================================================
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5 //
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6 // mempoolt.inl
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7 //
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8 // Mempoolt (Memory pool template) class declarations
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9 //
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10 //==========================================================================
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11 // ####ECOSGPLCOPYRIGHTBEGIN####
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12 // -------------------------------------------
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13 // This file is part of eCos, the Embedded Configurable Operating System.
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14 // Copyright (C) 1998, 1999, 2000, 2001, 2002 Free Software Foundation, Inc.
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15 //
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16 // eCos is free software; you can redistribute it and/or modify it under
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17 // the terms of the GNU General Public License as published by the Free
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18 // Software Foundation; either version 2 or (at your option) any later
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19 // version.
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20 //
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21 // eCos is distributed in the hope that it will be useful, but WITHOUT
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22 // ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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23 // FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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24 // for more details.
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25 //
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26 // You should have received a copy of the GNU General Public License
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27 // along with eCos; if not, write to the Free Software Foundation, Inc.,
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28 // 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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29 //
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30 // As a special exception, if other files instantiate templates or use
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31 // macros or inline functions from this file, or you compile this file
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32 // and link it with other works to produce a work based on this file,
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33 // this file does not by itself cause the resulting work to be covered by
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34 // the GNU General Public License. However the source code for this file
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35 // must still be made available in accordance with section (3) of the GNU
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36 // General Public License v2.
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37 //
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38 // This exception does not invalidate any other reasons why a work based
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39 // on this file might be covered by the GNU General Public License.
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40 // -------------------------------------------
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41 // ####ECOSGPLCOPYRIGHTEND####
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42 //==========================================================================
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43 //#####DESCRIPTIONBEGIN####
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44 //
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45 // Author(s): hmt
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46 // Contributors: hmt
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47 // Date: 1998-02-10
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48 // Purpose: Define Mempoolt class interface
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49
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50 // Description: The class defined here provides the APIs for thread-safe,
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51 // kernel-savvy memory managers; make a class with the
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52 // underlying allocator as the template parameter.
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53 // Usage: #include <cyg/kernel/mempoolt.hxx>
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54 //
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55 //
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56 //####DESCRIPTIONEND####
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57 //
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58 //==========================================================================
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59
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60 #include <cyg/kernel/thread.inl> // implementation eg. Cyg_Thread::self();
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61 #include <cyg/kernel/sched.inl> // implementation eg. Cyg_Scheduler::lock();
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62
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63 // -------------------------------------------------------------------------
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64 // Constructor; we _require_ these arguments and just pass them through to
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65 // the implementation memory pool in use.
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66 template <class T>
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67 Cyg_Mempoolt<T>::Cyg_Mempoolt(
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68 cyg_uint8 *base,
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69 cyg_int32 size,
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70 CYG_ADDRWORD arg_thru) // Constructor
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71 : pool( base, size, arg_thru )
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72 {
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73 }
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75
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76 template <class T>
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77 Cyg_Mempoolt<T>::~Cyg_Mempoolt() // destructor
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78 {
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79 // Prevent preemption
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80 Cyg_Scheduler::lock();
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81
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82 while ( ! queue.empty() ) {
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83 Cyg_Thread *thread = queue.dequeue();
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84 thread->set_wake_reason( Cyg_Thread::DESTRUCT );
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85 thread->wake();
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86 }
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87
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88 // Unlock the scheduler and maybe switch threads
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89 Cyg_Scheduler::unlock();
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90 }
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91
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92 // -------------------------------------------------------------------------
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93 // get some memory; wait if none available
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94 template <class T>
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95 inline cyg_uint8 *
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96 Cyg_Mempoolt<T>::alloc( cyg_int32 size )
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97 {
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98 CYG_REPORT_FUNCTION();
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99
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100 Cyg_Thread *self = Cyg_Thread::self();
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101
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102 // Prevent preemption
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103 Cyg_Scheduler::lock();
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104 CYG_ASSERTCLASS( this, "Bad this pointer");
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105
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106 // Loop while we got no memory, sleeping each time around the
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107 // loop. This copes with the possibility of a higher priority thread
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108 // grabbing the freed storage between the wakeup in free() and this
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109 // thread actually starting.
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110 cyg_uint8 *ret;
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111 cyg_bool result = true;
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112 while( result && (NULL == (ret = pool.alloc( size ))) ) {
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113
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114 CYG_MEMALLOC_FAIL(size);
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115
115
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116 self->set_sleep_reason( Cyg_Thread::WAIT );
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117 self->sleep();
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118 queue.enqueue( self );
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119
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120 CYG_ASSERT( 1 == Cyg_Scheduler::get_sched_lock(),
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121 "Called with non-zero scheduler lock");
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122
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123 // Unlock scheduler and allow other threads to run
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124 Cyg_Scheduler::unlock();
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125 Cyg_Scheduler::lock();
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126
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127 CYG_ASSERTCLASS( this, "Bad this pointer");
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128
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129 switch( self->get_wake_reason() )
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130 {
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131 case Cyg_Thread::DESTRUCT:
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132 case Cyg_Thread::BREAK:
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133 result = false;
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134 break;
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135
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136 case Cyg_Thread::EXIT:
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137 self->exit();
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138 break;
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139
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140 default:
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141 break;
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142 }
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143 }
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144 CYG_ASSERTCLASS( this, "Bad this pointer");
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145
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146 if ( ! result )
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147 ret = NULL;
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148
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149 // Unlock the scheduler and maybe switch threads
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150 Cyg_Scheduler::unlock();
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151 CYG_REPORT_RETVAL( ret );
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152 return ret;
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153 }
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154
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155 #ifdef CYGFUN_KERNEL_THREADS_TIMER
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156 // -------------------------------------------------------------------------
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157 // get some memory with a timeout
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158 template <class T>
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159 inline cyg_uint8 *
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160 Cyg_Mempoolt<T>::alloc( cyg_int32 size, cyg_tick_count abs_timeout )
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161 {
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162 CYG_REPORT_FUNCTION();
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163
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164 Cyg_Thread *self = Cyg_Thread::self();
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165
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166 // Prevent preemption
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167 Cyg_Scheduler::lock();
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168 CYG_ASSERTCLASS( this, "Bad this pointer");
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169
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170 // Loop while we got no memory, sleeping each time around the
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171 // loop. This copes with the possibility of a higher priority thread
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172 // grabbing the freed storage between the wakeup in free() and this
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173 // thread actually starting.
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174 cyg_uint8 *ret;
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175 cyg_bool result = true;
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176 // Set the timer _once_ outside the loop.
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177 self->set_timer( abs_timeout, Cyg_Thread::TIMEOUT );
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178
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179 // If the timeout is in the past, the wake reason will have been
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180 // set to something other than NONE already. Set the result false
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181 // to force an immediate return.
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182
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183 if( self->get_wake_reason() != Cyg_Thread::NONE )
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184 result = false;
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185
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186 while( result && (NULL == (ret = pool.alloc( size ))) ) {
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187 CYG_MEMALLOC_FAIL(size);
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188
115
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189 self->set_sleep_reason( Cyg_Thread::TIMEOUT );
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190 self->sleep();
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191 queue.enqueue( self );
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192
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193 CYG_ASSERT( 1 == Cyg_Scheduler::get_sched_lock(),
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194 "Called with non-zero scheduler lock");
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195
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196 // Unlock scheduler and allow other threads to run
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197 Cyg_Scheduler::unlock();
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198 Cyg_Scheduler::lock();
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199
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200 CYG_ASSERTCLASS( this, "Bad this pointer");
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201 switch( self->get_wake_reason() )
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202 {
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203 case Cyg_Thread::TIMEOUT:
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204 result = false;
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205 break;
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206
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207 case Cyg_Thread::DESTRUCT:
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208 case Cyg_Thread::BREAK:
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209 result = false;
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210 break;
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211
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212 case Cyg_Thread::EXIT:
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213 self->exit();
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214 break;
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215
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216 default:
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217 break;
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218 }
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219 }
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220
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221 CYG_ASSERTCLASS( this, "Bad this pointer");
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222
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223 if ( ! result )
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224 ret = NULL;
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225
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226 // clear the timer; if it actually fired, no worries.
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227 self->clear_timer();
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228
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229 // Unlock the scheduler and maybe switch threads
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230 Cyg_Scheduler::unlock();
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231 CYG_REPORT_RETVAL( ret );
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232 return ret;
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233 }
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234 #endif
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235
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236 // -------------------------------------------------------------------------
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237 // get some memory, return NULL if none available
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238 template <class T>
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239 inline cyg_uint8 *
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240 Cyg_Mempoolt<T>::try_alloc( cyg_int32 size )
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241 {
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242 CYG_REPORT_FUNCTION();
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243
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244 // Prevent preemption
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245 Cyg_Scheduler::lock();
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246 CYG_ASSERTCLASS( this, "Bad this pointer");
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247
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248 cyg_uint8 *ret = pool.alloc( size );
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249
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250 CYG_ASSERTCLASS( this, "Bad this pointer");
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251
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252 // Unlock the scheduler and maybe switch threads
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253 Cyg_Scheduler::unlock();
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254 CYG_REPORT_RETVAL( ret );
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255
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256 CYG_MEMALLOC_FAIL_TEST(ret==NULL, size);
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257
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258 return ret;
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259 }
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260
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261
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262 // -------------------------------------------------------------------------
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263 // free the memory back to the pool
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264 template <class T>
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265 cyg_bool
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266 Cyg_Mempoolt<T>::free( cyg_uint8 *p, cyg_int32 size )
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267 {
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268 // Prevent preemption
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269 Cyg_Scheduler::lock();
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270 CYG_ASSERTCLASS( this, "Bad this pointer");
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271
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272 cyg_int32 ret = pool.free( p, size );
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273
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274 CYG_ASSERTCLASS( this, "Bad this pointer");
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275
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276 while ( ret && !queue.empty() ) {
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277 // we succeeded and there are people waiting
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278 Cyg_Thread *thread = queue.dequeue();
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279
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280 CYG_ASSERTCLASS( thread, "Bad thread pointer");
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281
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282 // we wake them all up (ie. broadcast) to cope with variable block
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283 // allocators freeing a big block when lots of small allocs wait.
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284 thread->set_wake_reason( Cyg_Thread::DONE );
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285 thread->wake();
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286 // we cannot yield here; if a higher prio thread can't satisfy its
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287 // request it would re-queue and we would loop forever
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288 }
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289 // Unlock the scheduler and maybe switch threads
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290 Cyg_Scheduler::unlock();
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291 return ret;
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292 }
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293
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294 // -------------------------------------------------------------------------
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295 // if applicable: return -1 if not fixed size
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296 template <class T>
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297 inline cyg_int32
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298 Cyg_Mempoolt<T>::get_blocksize()
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299 {
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300 // there should not be any atomicity issues here
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301 return pool.get_blocksize();
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302 }
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303
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304 // -------------------------------------------------------------------------
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305 // these two are obvious and generic, but need atomicity protection (maybe)
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306 template <class T>
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307 inline cyg_int32
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308 Cyg_Mempoolt<T>::get_totalmem()
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309 {
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310 // Prevent preemption
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311 Cyg_Scheduler::lock();
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312 CYG_ASSERTCLASS( this, "Bad this pointer");
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313
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314 cyg_int32 ret = pool.get_totalmem();
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315
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316 // Unlock the scheduler and maybe switch threads
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317 Cyg_Scheduler::unlock();
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318 return ret;
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319 }
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320
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321 template <class T>
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322 inline cyg_int32
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323 Cyg_Mempoolt<T>::get_freemem()
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324 {
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325 // Prevent preemption
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326 Cyg_Scheduler::lock();
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327 CYG_ASSERTCLASS( this, "Bad this pointer");
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328
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329 cyg_int32 ret = pool.get_freemem();
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330
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331 // Unlock the scheduler and maybe switch threads
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332 Cyg_Scheduler::unlock();
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333 return ret;
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334 }
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335
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336 // -------------------------------------------------------------------------
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337 // get information about the construction parameters for external
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338 // freeing after the destruction of the holding object
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339 template <class T>
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340 inline void
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341 Cyg_Mempoolt<T>::get_arena(
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342 cyg_uint8 * &base, cyg_int32 &size, CYG_ADDRWORD &arg_thru )
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343 {
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344 // Prevent preemption
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345 Cyg_Scheduler::lock();
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346 CYG_ASSERTCLASS( this, "Bad this pointer");
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347
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348 pool.get_arena( base, size, arg_thru );
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349
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350 // Unlock the scheduler and maybe switch threads
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351 Cyg_Scheduler::unlock();
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352 }
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353
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354 // -------------------------------------------------------------------------
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355 // Return the size of the memory allocation (previously returned
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356 // by alloc() or try_alloc() ) at ptr. Returns -1 if not found
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357 template <class T>
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358 cyg_int32
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359 Cyg_Mempoolt<T>::get_allocation_size( cyg_uint8 *ptr )
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360 {
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361 cyg_int32 ret;
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362
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363 // Prevent preemption
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364 Cyg_Scheduler::lock();
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365 CYG_ASSERTCLASS( this, "Bad this pointer");
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366
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367 ret = pool.get_allocation_size( ptr );
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368
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369 // Unlock the scheduler and maybe switch threads
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370 Cyg_Scheduler::unlock();
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371
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372 return ret;
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373 }
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374
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375 // -------------------------------------------------------------------------
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376 // debugging/assert function
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377
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378 #ifdef CYGDBG_USE_ASSERTS
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379
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380 template <class T>
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381 inline cyg_bool
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382 Cyg_Mempoolt<T>::check_this(cyg_assert_class_zeal zeal) const
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383 {
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384 CYG_REPORT_FUNCTION();
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385
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386 if ( Cyg_Thread::DESTRUCT == Cyg_Thread::self()->get_wake_reason() )
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387 // then the whole thing is invalid, and we know it.
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388 // so return OK, since this check should NOT make an error.
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389 return true;
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390
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391 // check that we have a non-NULL pointer first
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392 if( this == NULL ) return false;
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393
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394 return true;
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395 }
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396 #endif
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397
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398 // -------------------------------------------------------------------------
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399 #endif // ifndef CYGONCE_KERNEL_MEMPOOLT_INL
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400 // EOF mempoolt.inl