author | Tero Marttila <terom@fixme.fi> |
Fri, 18 Jul 2008 21:28:42 +0300 | |
changeset 11175 | 020c61e39c94 |
parent 10866 | 242436c016b8 |
permissions | -rw-r--r-- |
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/* $Id$ */ |
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/** @file thread_morphos.cpp MorphOS implementation of Threads. */ |
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#include "stdafx.h" |
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#include "thread.h" |
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#include "debug.h" |
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#include "core/alloc_func.hpp" |
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#include <stdlib.h> |
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#include <unistd.h> |
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#include <exec/types.h> |
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#include <exec/rawfmt.h> |
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#include <dos/dostags.h> |
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#include <proto/dos.h> |
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#include <proto/exec.h> |
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/** |
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* avoid name clashes with MorphOS API functions |
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*/ |
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#undef Exit |
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#undef Wait |
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/** |
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* NOTE: this code heavily depends on latest libnix updates. So make |
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* sure you link with new stuff which supports semaphore locking of |
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* the IO resources, else it will just go foobar. |
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*/ |
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struct OTTDThreadStartupMessage { |
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struct Message msg; ///< standard exec.library message (MUST be the first thing in the message struct!) |
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OTTDThreadFunc func; ///< function the thread will execute |
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void *arg; ///< functions arguments for the thread function |
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}; |
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/** |
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* Default OpenTTD STDIO/ERR debug output is not very useful for this, so we |
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* utilize serial/ramdebug instead. |
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*/ |
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#ifndef NO_DEBUG_MESSAGES |
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void KPutStr(CONST_STRPTR format) |
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{ |
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RawDoFmt(format, NULL, (void (*)())RAWFMTFUNC_SERIAL, NULL); |
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} |
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#else |
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#define KPutStr(x) |
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#endif |
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/** |
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* MorphOS version for ThreadObject. |
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*/ |
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class ThreadObject_MorphOS : public ThreadObject { |
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private: |
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APTR m_thr; ///< System thread identifier. |
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struct MsgPort *m_replyport; |
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struct OTTDThreadStartupMessage m_msg; |
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public: |
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/** |
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* Create a sub process and start it, calling proc(param). |
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*/ |
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ThreadObject_MorphOS(OTTDThreadFunc proc, void *param) : m_thr(0) |
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{ |
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struct Task *parent; |
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KPutStr("[OpenTTD] Create thread...\n"); |
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parent = FindTask(NULL); |
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/* Make sure main thread runs with sane priority */ |
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SetTaskPri(parent, 0); |
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/* Things we'll pass down to the child by utilizing NP_StartupMsg */ |
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m_msg.func = proc; |
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m_msg.arg = param; |
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m_replyport = CreateMsgPort(); |
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if (m_replyport != NULL) { |
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struct Process *child; |
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m_msg.msg.mn_Node.ln_Type = NT_MESSAGE; |
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m_msg.msg.mn_ReplyPort = m_replyport; |
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m_msg.msg.mn_Length = sizeof(struct OTTDThreadStartupMessage); |
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child = CreateNewProcTags( |
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NP_CodeType, CODETYPE_PPC, |
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NP_Entry, ThreadObject_MorphOS::Proxy, |
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NP_StartupMsg, (IPTR)&m_msg, |
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NP_Priority, 5UL, |
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NP_Name, (IPTR)"OpenTTD Thread", |
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NP_PPCStackSize, 131072UL, |
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TAG_DONE); |
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m_thr = (APTR) child; |
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if (child != NULL) { |
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KPutStr("[OpenTTD] Child process launched.\n"); |
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} else { |
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KPutStr("[OpenTTD] Couldn't create child process. (constructors never fail, yeah!)\n"); |
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DeleteMsgPort(m_replyport); |
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} |
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} |
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} |
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/** |
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* Create a thread and attach current thread to it. |
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*/ |
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ThreadObject_MorphOS() : m_thr(0) |
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{ |
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m_thr = FindTask(NULL); |
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} |
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/* virtual */ ~ThreadObject_MorphOS() |
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120 |
{ |
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121 |
} |
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122 |
|
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123 |
/* virtual */ bool IsRunning() |
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124 |
{ |
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125 |
return m_thr != 0; |
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126 |
} |
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127 |
|
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128 |
/* virtual */ bool WaitForStop() |
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129 |
{ |
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130 |
/* You can't wait on yourself */ |
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131 |
assert(!IsCurrent()); |
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132 |
/* If the thread is not running, waiting is over */ |
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133 |
if (!IsRunning()) return true; |
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|
134 |
|
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135 |
WaitPort(m_replyport); |
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136 |
|
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137 |
GetMsg(m_replyport); |
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138 |
DeleteMsgPort(m_replyport); |
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139 |
|
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140 |
return true; |
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141 |
} |
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142 |
|
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143 |
/* virtual */ bool Exit() |
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144 |
{ |
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145 |
struct OTTDThreadStartupMessage *msg; |
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|
146 |
|
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147 |
/* You can only exit yourself */ |
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148 |
assert(IsCurrent()); |
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149 |
/* If the thread is not running, we are already closed */ |
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150 |
if (!IsRunning()) return false; |
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|
151 |
|
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152 |
KPutStr("[Child] Aborting...\n"); |
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153 |
|
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154 |
if (NewGetTaskAttrs(NULL, &msg, sizeof(struct OTTDThreadStartupMessage *), TASKINFOTYPE_STARTUPMSG, TAG_DONE) && msg != NULL) { |
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155 |
/* For now we terminate by throwing an error, gives much cleaner cleanup */ |
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156 |
throw 0; |
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|
157 |
} |
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|
158 |
|
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|
159 |
return true; |
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160 |
} |
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161 |
|
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162 |
/* virtual */ void Join() |
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163 |
{ |
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164 |
struct OTTDThreadStartupMessage *reply; |
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|
165 |
|
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166 |
/* You cannot join yourself */ |
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|
167 |
assert(!IsCurrent()); |
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|
168 |
|
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169 |
KPutStr("[OpenTTD] Join threads...\n"); |
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170 |
KPutStr("[OpenTTD] Wait for child to quit...\n"); |
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171 |
WaitPort(m_replyport); |
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|
172 |
|
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173 |
GetMsg(m_replyport); |
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174 |
DeleteMsgPort(m_replyport); |
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175 |
m_thr = 0; |
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176 |
} |
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|
177 |
|
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178 |
/* virtual */ bool IsCurrent() |
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179 |
{ |
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180 |
return FindTask(NULL) == m_thr; |
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181 |
} |
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|
182 |
|
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183 |
/* virtual */ uint GetId() |
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184 |
{ |
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185 |
return (uint)m_thr; |
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186 |
} |
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|
187 |
|
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188 |
private: |
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189 |
/** |
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|
190 |
* On thread creation, this function is called, which calls the real startup |
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191 |
* function. This to get back into the correct instance again. |
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|
192 |
*/ |
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193 |
static void Proxy(void) |
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|
194 |
{ |
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|
195 |
struct Task *child = FindTask(NULL); |
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|
196 |
struct OTTDThreadStartupMessage *msg; |
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|
197 |
|
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|
198 |
/* Make sure, we don't block the parent. */ |
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|
199 |
SetTaskPri(child, -5); |
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|
200 |
|
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|
201 |
KPutStr("[Child] Progressing...\n"); |
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|
202 |
|
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|
203 |
if (NewGetTaskAttrs(NULL, &msg, sizeof(struct OTTDThreadStartupMessage *), TASKINFOTYPE_STARTUPMSG, TAG_DONE) && msg != NULL) { |
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|
204 |
try { |
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205 |
msg->func(msg->arg); |
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|
206 |
} catch(...) { |
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|
207 |
KPutStr("[Child] Returned to main()\n"); |
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|
208 |
} |
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|
209 |
} |
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|
210 |
|
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|
211 |
/* Quit the child, exec.library will reply the startup msg internally. */ |
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212 |
KPutStr("[Child] Done.\n"); |
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|
213 |
} |
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|
214 |
}; |
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|
215 |
|
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216 |
/* static */ ThreadObject *ThreadObject::New(OTTDThreadFunc proc, void *param) |
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217 |
{ |
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218 |
return new ThreadObject_MorphOS(proc, param); |
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219 |
} |
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|
220 |
|
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|
221 |
/* static */ ThreadObject *ThreadObject::AttachCurrent() |
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222 |
{ |
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223 |
return new ThreadObject_MorphOS(); |
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224 |
} |
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|
225 |
|
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226 |
/* static */ uint ThreadObject::CurrentId() |
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227 |
{ |
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228 |
return (uint) FindTask(NULL); |
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|
229 |
} |
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|
230 |
|
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|
231 |
|
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|
232 |
/** |
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233 |
* MorphOS version of ThreadSemaphore. |
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234 |
*/ |
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235 |
class ThreadSemaphore_MorphOS : public ThreadSemaphore { |
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236 |
private: |
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|
237 |
struct SignalSemaphore m_sem; |
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|
238 |
|
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|
239 |
public: |
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|
240 |
ThreadSemaphore_MorphOS() |
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{ |
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InitSemaphore(&m_sem); |
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} |
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/* virtual */ ~ThreadSemaphore_MorphOS() |
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{ |
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} |
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/* virtual */ void Set() |
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{ |
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/* Check if semaphore count is really important there. */ |
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ReleaseSemaphore(&m_sem); |
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} |
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/* virtual */ void Wait() |
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{ |
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ObtainSemaphore(&m_sem); |
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} |
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}; |
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/* static */ ThreadSemaphore *ThreadSemaphore::New() |
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{ |
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return new ThreadSemaphore_MorphOS(); |
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} |