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<div id=Content><div class="CSection"><div class=CTopic id=MainTopic><h1 class=CTitle><a name="Unnamed_semaphores"></a>Unnamed semaphores</h1><div class=CBody><p>Unnamed semaphores.</p><!--START_ND_SUMMARY--><div class=Summary><div class=STitle>Summary</div><div class=SBorder><table border=0 cellspacing=0 cellpadding=0 class=STable><tr class="SMain"><td class=SEntry><a href="#Unnamed_semaphores" >Unnamed semaphores</a></td><td class=SDescription>Unnamed semaphores.</td></tr><tr class="SGroup SIndent1"><td class=SEntry><a href="#Types" >Types</a></td><td class=SDescription></td></tr><tr class="SType SIndent2 SMarked"><td class=SEntry><a href="#nacore_sem" id=link1 onMouseOver="ShowTip(event, 'tt1', 'link1')" onMouseOut="HideTip('tt1')">nacore_sem</a></td><td class=SDescription>Semaphore.</td></tr><tr class="SGroup SIndent1"><td class=SEntry><a href="#Functions" >Functions</a></td><td class=SDescription></td></tr><tr class="SFunction SIndent2 SMarked"><td class=SEntry><a href="#nacore_sem_new" id=link2 onMouseOver="ShowTip(event, 'tt2', 'link2')" onMouseOut="HideTip('tt2')">nacore_sem_new()</a></td><td class=SDescription>Creates a new semaphore.</td></tr><tr class="SFunction SIndent2"><td class=SEntry><a href="#nacore_sem_free" id=link3 onMouseOver="ShowTip(event, 'tt3', 'link3')" onMouseOut="HideTip('tt3')">nacore_sem_free()</a></td><td class=SDescription>Destroys a semaphore.</td></tr><tr class="SFunction SIndent2 SMarked"><td class=SEntry><a href="#nacore_sem_wait" id=link4 onMouseOver="ShowTip(event, 'tt4', 'link4')" onMouseOut="HideTip('tt4')">nacore_sem_wait()</a></td><td class=SDescription>Locks a semaphore.</td></tr><tr class="SFunction SIndent2"><td class=SEntry><a href="#nacore_sem_trywait" id=link5 onMouseOver="ShowTip(event, 'tt5', 'link5')" onMouseOut="HideTip('tt5')">nacore_sem_trywait()</a></td><td class=SDescription>Attempts to lock a semaphore.</td></tr><tr class="SFunction SIndent2 SMarked"><td class=SEntry><a href="#nacore_sem_post" id=link6 onMouseOver="ShowTip(event, 'tt6', 'link6')" onMouseOut="HideTip('tt6')">nacore_sem_post()</a></td><td class=SDescription>Unlocks a semaphore.</td></tr></table></div></div><!--END_ND_SUMMARY--></div></div></div>
<div class="CGroup"><div class=CTopic><h3 class=CTitle><a name="Types"></a>Types</h3></div></div>
<div class="CType"><div class=CTopic><h3 class=CTitle><a name="nacore_sem"></a>nacore_sem</h3><div class=CBody><blockquote><table border=0 cellspacing=0 cellpadding=0 class="Prototype"><tr><td class="prettyprint">typedef struct _nacore_sem *nacore_sem</td></tr></table></blockquote><p>Semaphore.</p></div></div></div>
<div class="CGroup"><div class=CTopic><h3 class=CTitle><a name="Functions"></a>Functions</h3></div></div>
<div class="CFunction"><div class=CTopic><h3 class=CTitle><a name="nacore_sem_new"></a>nacore_sem_new()</h3><div class=CBody><blockquote><table border=0 cellspacing=0 cellpadding=0 class="Prototype"><tr><td><table border=0 cellspacing=0 cellpadding=0><tr><td class="PBeforeParameters prettyprint "nowrap>_NACORE_DEF nacore_sem nacore_sem_new(</td><td class="PTypePrefix prettyprint " nowrap>unsigned </td><td class="PType prettyprint " nowrap>int </td><td class="PParameter prettyprint " nowrap>value</td><td class="PAfterParameters prettyprint "nowrap>)</td></tr></table></td></tr></table></blockquote><p>Creates a new semaphore.</p><h4 class=CHeading>Parameters</h4><table border=0 cellspacing=0 cellpadding=0 class=CDescriptionList><tr><td class=CDLEntry>value</td><td class=CDLDescription>Initial value.</td></tr></table><h4 class=CHeading>Returns</h4><p>The newly created semaphore or NULL if some error occured, in which case errno is set to ENOMEM if there was not enough memory, EINVAL if value is too big or <a href="types-h.html#NACORE_EUNKNOWN" class=LMacro id=link7 onMouseOver="ShowTip(event, 'tt7', 'link7')" onMouseOut="HideTip('tt7')">NACORE_EUNKNOWN</a> if another kind of error happened.</p></div></div></div>
<div class="CFunction"><div class=CTopic><h3 class=CTitle><a name="nacore_sem_free"></a>nacore_sem_free()</h3><div class=CBody><blockquote><table border=0 cellspacing=0 cellpadding=0 class="Prototype"><tr><td><table border=0 cellspacing=0 cellpadding=0><tr><td class="PBeforeParameters prettyprint "nowrap>_NACORE_DEF void nacore_sem_free(</td><td class="PType prettyprint " nowrap>nacore_sem </td><td class="PParameter prettyprint " nowrap>sem</td><td class="PAfterParameters prettyprint "nowrap>)</td></tr></table></td></tr></table></blockquote><p>Destroys a semaphore.</p><p>Once this function is called, referring to mutex will cause undefined behavior.</p><h4 class=CHeading>Parameters</h4><table border=0 cellspacing=0 cellpadding=0 class=CDescriptionList><tr><td class=CDLEntry>sem</td><td class=CDLDescription>The semaphore to be destroyed.</td></tr></table></div></div></div>
<div class="CFunction"><div class=CTopic><h3 class=CTitle><a name="nacore_sem_wait"></a>nacore_sem_wait()</h3><div class=CBody><blockquote><table border=0 cellspacing=0 cellpadding=0 class="Prototype"><tr><td><table border=0 cellspacing=0 cellpadding=0><tr><td class="PBeforeParameters prettyprint "nowrap>_NACORE_DEF int nacore_sem_wait(</td><td class="PType prettyprint " nowrap>nacore_sem </td><td class="PParameter prettyprint " nowrap>sem</td><td class="PAfterParameters prettyprint "nowrap>)</td></tr></table></td></tr></table></blockquote><p>Locks a semaphore.</p><h4 class=CHeading>Parameters</h4><table border=0 cellspacing=0 cellpadding=0 class=CDescriptionList><tr><td class=CDLEntry>sem</td><td class=CDLDescription>The sempahore to be locked.</td></tr></table><h4 class=CHeading>Returns</h4><p>0 on success or EINTR if the call was interrupted by a signal.</p></div></div></div>
<div class="CFunction"><div class=CTopic><h3 class=CTitle><a name="nacore_sem_trywait"></a>nacore_sem_trywait()</h3><div class=CBody><blockquote><table border=0 cellspacing=0 cellpadding=0 class="Prototype"><tr><td><table border=0 cellspacing=0 cellpadding=0><tr><td class="PBeforeParameters prettyprint "nowrap>_NACORE_DEF int nacore_sem_trywait(</td><td class="PType prettyprint " nowrap>nacore_sem </td><td class="PParameter prettyprint " nowrap>sem</td><td class="PAfterParameters prettyprint "nowrap>)</td></tr></table></td></tr></table></blockquote><p>Attempts to lock a semaphore.</p><p>If the semaphore is already locked the call shall return immediately.</p><h4 class=CHeading>Parameters</h4><table border=0 cellspacing=0 cellpadding=0 class=CDescriptionList><tr><td class=CDLEntry>sem</td><td class=CDLDescription>The semaphore to be locked.</td></tr></table><h4 class=CHeading>Returns</h4><p>0 on success, EAGAIN if the semaphore was already locked or EINTR if the call was interrupted by a signal.</p></div></div></div>
<div class="CFunction"><div class=CTopic><h3 class=CTitle><a name="nacore_sem_post"></a>nacore_sem_post()</h3><div class=CBody><blockquote><table border=0 cellspacing=0 cellpadding=0 class="Prototype"><tr><td><table border=0 cellspacing=0 cellpadding=0><tr><td class="PBeforeParameters prettyprint "nowrap>_NACORE_DEF int nacore_sem_post(</td><td class="PType prettyprint " nowrap>nacore_sem </td><td class="PParameter prettyprint " nowrap>sem</td><td class="PAfterParameters prettyprint "nowrap>)</td></tr></table></td></tr></table></blockquote><p>Unlocks a semaphore.</p><h4 class=CHeading>Parameters</h4><table border=0 cellspacing=0 cellpadding=0 class=CDescriptionList><tr><td class=CDLEntry>sem</td><td class=CDLDescription>The semaphore to be unlocked.</td></tr></table><h4 class=CHeading>Returns</h4><p>0 on success or <a href="types-h.html#NACORE_EUNKNOWN" class=LMacro id=link8 onMouseOver="ShowTip(event, 'tt7', 'link8')" onMouseOut="HideTip('tt7')">NACORE_EUNKNOWN</a> if some error happened.</p></div></div></div>
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<div class=CToolTip id="tt1"><div class=CType><blockquote><table border=0 cellspacing=0 cellpadding=0 class="Prototype"><tr><td class="prettyprint">typedef struct _nacore_sem *nacore_sem</td></tr></table></blockquote>Semaphore.</div></div><div class=CToolTip id="tt2"><div class=CFunction><blockquote><table border=0 cellspacing=0 cellpadding=0 class="Prototype"><tr><td><table border=0 cellspacing=0 cellpadding=0><tr><td class="PBeforeParameters prettyprint "nowrap>_NACORE_DEF nacore_sem nacore_sem_new(</td><td class="PTypePrefix prettyprint " nowrap>unsigned </td><td class="PType prettyprint " nowrap>int </td><td class="PParameter prettyprint " nowrap>value</td><td class="PAfterParameters prettyprint "nowrap>)</td></tr></table></td></tr></table></blockquote>Creates a new semaphore.</div></div><div class=CToolTip id="tt3"><div class=CFunction><blockquote><table border=0 cellspacing=0 cellpadding=0 class="Prototype"><tr><td><table border=0 cellspacing=0 cellpadding=0><tr><td class="PBeforeParameters prettyprint "nowrap>_NACORE_DEF void nacore_sem_free(</td><td class="PType prettyprint " nowrap>nacore_sem </td><td class="PParameter prettyprint " nowrap>sem</td><td class="PAfterParameters prettyprint "nowrap>)</td></tr></table></td></tr></table></blockquote>Destroys a semaphore.</div></div><div class=CToolTip id="tt4"><div class=CFunction><blockquote><table border=0 cellspacing=0 cellpadding=0 class="Prototype"><tr><td><table border=0 cellspacing=0 cellpadding=0><tr><td class="PBeforeParameters prettyprint "nowrap>_NACORE_DEF int nacore_sem_wait(</td><td class="PType prettyprint " nowrap>nacore_sem </td><td class="PParameter prettyprint " nowrap>sem</td><td class="PAfterParameters prettyprint "nowrap>)</td></tr></table></td></tr></table></blockquote>Locks a semaphore.</div></div><div class=CToolTip id="tt5"><div class=CFunction><blockquote><table border=0 cellspacing=0 cellpadding=0 class="Prototype"><tr><td><table border=0 cellspacing=0 cellpadding=0><tr><td class="PBeforeParameters prettyprint "nowrap>_NACORE_DEF int nacore_sem_trywait(</td><td class="PType prettyprint " nowrap>nacore_sem </td><td class="PParameter prettyprint " nowrap>sem</td><td class="PAfterParameters prettyprint "nowrap>)</td></tr></table></td></tr></table></blockquote>Attempts to lock a semaphore.</div></div><div class=CToolTip id="tt6"><div class=CFunction><blockquote><table border=0 cellspacing=0 cellpadding=0 class="Prototype"><tr><td><table border=0 cellspacing=0 cellpadding=0><tr><td class="PBeforeParameters prettyprint "nowrap>_NACORE_DEF int nacore_sem_post(</td><td class="PType prettyprint " nowrap>nacore_sem </td><td class="PParameter prettyprint " nowrap>sem</td><td class="PAfterParameters prettyprint "nowrap>)</td></tr></table></td></tr></table></blockquote>Unlocks a semaphore.</div></div><div class=CToolTip id="tt7"><div class=CMacro>Error code for unknown errors.</div></div><!--END_ND_TOOLTIPS-->
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