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<a href="#func-members">Functions</a> </div>
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<div class="title">Thread Flags<div class="ingroups"><a class="el" href="group__CMSIS__RTOS.html">CMSIS-RTOS2 API</a></div></div> </div>
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<div class="contents">
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<p>Synchronize threads using flags.
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<a href="#details">More...</a></p>
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<table class="memberdecls">
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<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="func-members"></a>
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Functions</h2></td></tr>
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<tr class="memitem:ga6f89ef9caded1d9963c7b12b0f6412c9"><td class="memItemLeft" align="right" valign="top">uint32_t </td><td class="memItemRight" valign="bottom"><a class="el" href="group__CMSIS__RTOS__ThreadFlagsMgmt.html#ga6f89ef9caded1d9963c7b12b0f6412c9">osThreadFlagsSet</a> (<a class="el" href="group__CMSIS__RTOS__ThreadMgmt.html#gaa6c32fe2a3e0a2e01f212d55b02e51c7">osThreadId_t</a> thread_id, uint32_t flags)</td></tr>
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<tr class="memdesc:ga6f89ef9caded1d9963c7b12b0f6412c9"><td class="mdescLeft"> </td><td class="mdescRight">Set the specified Thread Flags of a thread. <a href="#ga6f89ef9caded1d9963c7b12b0f6412c9">More...</a><br/></td></tr>
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<tr class="separator:ga6f89ef9caded1d9963c7b12b0f6412c9"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:ga656abc1c862c5b9a2b13584c42cc0bfa"><td class="memItemLeft" align="right" valign="top">uint32_t </td><td class="memItemRight" valign="bottom"><a class="el" href="group__CMSIS__RTOS__ThreadFlagsMgmt.html#ga656abc1c862c5b9a2b13584c42cc0bfa">osThreadFlagsClear</a> (uint32_t flags)</td></tr>
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<tr class="memdesc:ga656abc1c862c5b9a2b13584c42cc0bfa"><td class="mdescLeft"> </td><td class="mdescRight">Clear the specified Thread Flags of current running thread. <a href="#ga656abc1c862c5b9a2b13584c42cc0bfa">More...</a><br/></td></tr>
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<tr class="separator:ga656abc1c862c5b9a2b13584c42cc0bfa"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:ga85c8d2c89466e25abbcb545d9ddd71ba"><td class="memItemLeft" align="right" valign="top">uint32_t </td><td class="memItemRight" valign="bottom"><a class="el" href="group__CMSIS__RTOS__ThreadFlagsMgmt.html#ga85c8d2c89466e25abbcb545d9ddd71ba">osThreadFlagsGet</a> (void)</td></tr>
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<tr class="memdesc:ga85c8d2c89466e25abbcb545d9ddd71ba"><td class="mdescLeft"> </td><td class="mdescRight">Get the current Thread Flags of current running thread. <a href="#ga85c8d2c89466e25abbcb545d9ddd71ba">More...</a><br/></td></tr>
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<tr class="separator:ga85c8d2c89466e25abbcb545d9ddd71ba"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:gac11542ad6300b600f872fc96e340ec2b"><td class="memItemLeft" align="right" valign="top">uint32_t </td><td class="memItemRight" valign="bottom"><a class="el" href="group__CMSIS__RTOS__ThreadFlagsMgmt.html#gac11542ad6300b600f872fc96e340ec2b">osThreadFlagsWait</a> (uint32_t flags, uint32_t options, uint32_t timeout)</td></tr>
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<tr class="memdesc:gac11542ad6300b600f872fc96e340ec2b"><td class="mdescLeft"> </td><td class="mdescRight">Wait for one or more Thread Flags of the current running thread to become signaled. <a href="#gac11542ad6300b600f872fc96e340ec2b">More...</a><br/></td></tr>
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<tr class="separator:gac11542ad6300b600f872fc96e340ec2b"><td class="memSeparator" colspan="2"> </td></tr>
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</table>
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<a name="details" id="details"></a><h2 class="groupheader">Description</h2>
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<p>Thread Flags are a more specialized version of the Event Flags. See <a class="el" href="group__CMSIS__RTOS__EventFlags.html">Event Flags</a>. While Event Flags can be used to globally signal a number of threads, thread flags are only send to a single specific thread. Every thread instance can receive thread flags without any additional allocation of a thread flags object.</p>
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<dl class="section note"><dt>Note</dt><dd>Thread flag management functions cannot be called from <a class="el" href="theory_of_operation.html#CMSIS_RTOS_ISR_Calls">Interrupt Service Routines</a>, except for <a class="el" href="group__CMSIS__RTOS__ThreadFlagsMgmt.html#ga6f89ef9caded1d9963c7b12b0f6412c9">osThreadFlagsSet</a>. </dd></dl>
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<h2 class="groupheader">Function Documentation</h2>
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<a class="anchor" id="ga6f89ef9caded1d9963c7b12b0f6412c9"></a>
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<td class="memname">uint32_t osThreadFlagsSet </td>
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<td>(</td>
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<td class="paramtype"><a class="el" href="group__CMSIS__RTOS__ThreadMgmt.html#gaa6c32fe2a3e0a2e01f212d55b02e51c7">osThreadId_t</a> </td>
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<td class="paramname"><em>thread_id</em>, </td>
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<td class="paramtype">uint32_t </td>
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<td class="paramname"><em>flags</em> </td>
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<td>)</td>
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<td></td><td></td>
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<dl class="params"><dt>Parameters</dt><dd>
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<table class="params">
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<tr><td class="paramdir">[in]</td><td class="paramname">thread_id</td><td>thread ID obtained by <a class="el" href="group__CMSIS__RTOS__ThreadMgmt.html#ga48d68b8666d99d28fa646ee1d2182b8f">osThreadNew</a> or <a class="el" href="group__CMSIS__RTOS__ThreadMgmt.html#ga8df03548e89fbc56402a5cd584a505da">osThreadGetId</a>. </td></tr>
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<tr><td class="paramdir">[in]</td><td class="paramname">flags</td><td>specifies the flags of the thread that shall be set. </td></tr>
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<dl class="section return"><dt>Returns</dt><dd>thread flags after setting or error code if highest bit set.</dd></dl>
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<p>The function <b>osThreadFlagsSet</b> sets the thread flags for a thread specified by parameter <em>thread_id</em>. It returns the flags set, or an error code if highest bit is set (refer to <a class="el" href="group__flags__error__codes.html">Flags Functions Error Codes</a>). This function may be used also within interrupt service routines. Threads waiting for a flag to be set will resume from <em>BLOCKED</em> state.</p>
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<dl class="section note"><dt>Note</dt><dd>This function may be called from <a class="el" href="theory_of_operation.html#CMSIS_RTOS_ISR_Calls">Interrupt Service Routines</a>. </dd></dl>
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<td class="memname">uint32_t osThreadFlagsClear </td>
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<td>(</td>
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<td class="paramtype">uint32_t </td>
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<td class="paramname"><em>flags</em></td><td>)</td>
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<td></td>
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<dl class="params"><dt>Parameters</dt><dd>
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<tr><td class="paramdir">[in]</td><td class="paramname">flags</td><td>specifies the flags of the thread that shall be cleared. </td></tr>
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<dl class="section return"><dt>Returns</dt><dd>thread flags before clearing or error code if highest bit set.</dd></dl>
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<p>The function <b>osThreadFlagsClear</b> clears the specified flags for the currently running thread. It returns the flags before clearing, or an error code if highest bit is set (refer to <a class="el" href="group__flags__error__codes.html">Flags Functions Error Codes</a>).</p>
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<dl class="section note"><dt>Note</dt><dd>This function <b>cannot</b> be called from <a class="el" href="theory_of_operation.html#CMSIS_RTOS_ISR_Calls">Interrupt Service Routines</a>. </dd></dl>
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<td class="memname">uint32_t osThreadFlagsGet </td>
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<td>(</td>
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<td class="paramtype">void </td>
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<dl class="section return"><dt>Returns</dt><dd>current thread flags.</dd></dl>
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<p>The function <b>osThreadFlagsGet</b> returns the flags currently set for the currently running thread.</p>
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<dl class="section note"><dt>Note</dt><dd>This function <b>cannot</b> be called from <a class="el" href="theory_of_operation.html#CMSIS_RTOS_ISR_Calls">Interrupt Service Routines</a>. </dd></dl>
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<td class="memname">uint32_t osThreadFlagsWait </td>
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<td>(</td>
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<td class="paramtype">uint32_t </td>
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<td class="paramname"><em>flags</em>, </td>
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<td class="paramtype">uint32_t </td>
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</div><div class="memdoc">
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<dl class="params"><dt>Parameters</dt><dd>
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<table class="params">
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<tr><td class="paramdir">[in]</td><td class="paramname">flags</td><td>specifies the flags to wait for. </td></tr>
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<tr><td class="paramdir">[in]</td><td class="paramname">options</td><td>specifies flags options (osFlagsXxxx). </td></tr>
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<tr><td class="paramdir">[in]</td><td class="paramname">timeout</td><td><a class="el" href="theory_of_operation.html#CMSIS_RTOS_TimeOutValue">Timeout Value</a> or 0 in case of no time-out. </td></tr>
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</table>
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</dd>
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</dl>
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<dl class="section return"><dt>Returns</dt><dd>thread flags before clearing or error code if highest bit set.</dd></dl>
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<p>The function <b>osThreadFlagsWait</b> suspends the execution of the currently <b>RUNNING</b> thread until any or all of the thread flags specified with the parameter <em>flags</em> are set. When these thread flags are already set, the function returns instantly. Otherwise the thread is put into the state <b>BLOCKED</b>. The function then returns flags before clearing, or an error code if highest bit is set (refer to <a class="el" href="group__flags__error__codes.html">Flags Functions Error Codes</a>).</p>
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<p>The parameter <em>options</em> specifies the wait condition: </p>
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<table class="doxtable">
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<tr>
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<th>Option </th><th></th></tr>
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<tr>
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<td><b>osFlagsWaitAny</b> </td><td>Wait for any flag (default). </td></tr>
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<tr>
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<td><b>osFlagsWaitAll</b> </td><td>Wait for all flags. </td></tr>
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<tr>
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<td><b>osFlagsNoClear</b> </td><td>Do not clear flags which have been specified to wait for. </td></tr>
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</table>
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<p>If <code>osFlagsNoClear</code> is set in the options <a class="el" href="group__CMSIS__RTOS__ThreadFlagsMgmt.html#ga656abc1c862c5b9a2b13584c42cc0bfa">osThreadFlagsClear</a> can be used to clear flags manually.</p>
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<p>The parameter <a class="el" href="theory_of_operation.html#CMSIS_RTOS_TimeOutValue">timeout</a> represents a number of timer ticks and is an upper bound. The exact time delay depends on the actual time elapsed since the last timer tick.</p>
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<dl class="section note"><dt>Note</dt><dd>This function <b>cannot</b> be called from <a class="el" href="theory_of_operation.html#CMSIS_RTOS_ISR_Calls">Interrupt Service Routines</a>.</dd></dl>
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<p><b>Code Example</b> </p>
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<div class="fragment"><div class="line"><span class="preprocessor">#include "<a class="code" href="cmsis__os2_8h.html">cmsis_os2.h</a>"</span></div>
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<div class="line"> </div>
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<div class="line"><span class="keywordtype">void</span> Thread (<span class="keywordtype">void</span>* arg) {</div>
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<div class="line"> ;</div>
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<div class="line"> <a class="code" href="group__CMSIS__RTOS__ThreadFlagsMgmt.html#gac11542ad6300b600f872fc96e340ec2b">osThreadFlagsWait</a> (0x00000001U, <a class="code" href="group__CMSIS__RTOS__Definitions.html#ga18e63587b8450d5b8798b6f6ec04e012">osFlagsWaitAny</a>, <a class="code" href="group__CMSIS__RTOS__Definitions.html#ga9eb9a7a797a42e4b55eb171ecc609ddb">osWaitForever</a>); <span class="comment">// Wait forever until thread flag 1 is set.</span></div>
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<div class="line"> ;</div>
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<div class="line"> <a class="code" href="group__CMSIS__RTOS__ThreadFlagsMgmt.html#gac11542ad6300b600f872fc96e340ec2b">osThreadFlagsWait</a> (0x00000003U, <a class="code" href="group__CMSIS__RTOS__Definitions.html#ga18e63587b8450d5b8798b6f6ec04e012">osFlagsWaitAny</a>, <a class="code" href="group__CMSIS__RTOS__Definitions.html#ga9eb9a7a797a42e4b55eb171ecc609ddb">osWaitForever</a>); <span class="comment">// Wait forever until either thread flag 0 or 1 is set.</span></div>
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<div class="line"> ;</div>
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<div class="line"> <a class="code" href="group__CMSIS__RTOS__ThreadFlagsMgmt.html#gac11542ad6300b600f872fc96e340ec2b">osThreadFlagsWait</a> (0x00000003U, <a class="code" href="group__CMSIS__RTOS__Definitions.html#ga8b6f562736fbfb5428940e0c017dec24">osFlagsWaitAll</a>, 10); <span class="comment">// Wait for 10 timer ticks until thread flags 0 and 1 are set. Timeout afterwards.</span></div>
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<div class="line"> ;</div>
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<div class="line"> <a class="code" href="group__CMSIS__RTOS__ThreadFlagsMgmt.html#gac11542ad6300b600f872fc96e340ec2b">osThreadFlagsWait</a> (0x00000003U, <a class="code" href="group__CMSIS__RTOS__Definitions.html#ga8b6f562736fbfb5428940e0c017dec24">osFlagsWaitAll</a> | <a class="code" href="group__CMSIS__RTOS__Definitions.html#gaade844a42237d8c37569d4d9b16b9f1c">osFlagsNoClear</a>, <a class="code" href="group__CMSIS__RTOS__Definitions.html#ga9eb9a7a797a42e4b55eb171ecc609ddb">osWaitForever</a>); <span class="comment">// Same as the above, but the flags will not be cleared.</span></div>
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<div class="line">}</div>
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</div><!-- fragment -->
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<li class="footer">Generated on Wed Feb 8 2017 10:21:04 for CMSIS-RTOS2 by ARM Ltd. All rights reserved.
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