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php-manual-pt_BR-5.2.4-1mdv2008.1.noarch.rpm

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>CL. Funções de Memória Compartilhada</H1
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><A
NAME="AEN204247"
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><DIV
CLASS="section"
><H1
CLASS="section"
><A
NAME="shmop.intro"
>Introdução</A
></H1
><P
>&#13;     Shmop é um fácil caminho para usar funções que permitem o PHP ler,
     escrever, criar e deletar segmentos de memória compartilhada UNIX. Note que versões
     do Windows anteriores ao Windows 2000 não suportam memória compartilhada.
    </P
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><B
>Nota: </B
>
      No PHP 4.0.3, estas funções estão prefixadas por <TT
CLASS="literal"
>shm</TT
>
      ao invés de <TT
CLASS="literal"
>shmop</TT
>.
     </P
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NAME="shmop.requirements"
>Dependências</A
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>Nenhuma biblioteca externa é necessária para compilar esta extensão.</P
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>Instalação</A
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><P
>&#13;  Para usar shmop você precisará compilar o PHP com o parâmetro
  <CODE
CLASS="option"
>--enable-shmop</CODE
> na seu configure.
 </P
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>Esta extensão não define nenhum parâmetro de configuração no <TT
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>php.ini</TT
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>&#13;    </P
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>Constantes pré-definidas</A
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>Esta extensão não possui nenhuma constante.</P
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><B
>Exemplo 1. Visão Geral de Operações de Memória Compartilhada</B
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><code><font color="#000000">
<font color="#0000BB">&lt;?php<br />&nbsp;&nbsp;&nbsp;<br /></font><font color="#FF8000">// Create 100 byte shared memory block with system id if 0xff3<br /></font><font color="#0000BB">$shm_id </font><font color="#007700">= </font><font color="#0000BB">shmop_open</font><font color="#007700">(</font><font color="#0000BB">0xff3</font><font color="#007700">, </font><font color="#DD0000">"c"</font><font color="#007700">, </font><font color="#0000BB">0644</font><font color="#007700">, </font><font color="#0000BB">100</font><font color="#007700">);<br />if(!</font><font color="#0000BB">$shm_id</font><font color="#007700">) {<br />&nbsp;&nbsp;&nbsp;&nbsp;echo </font><font color="#DD0000">"Couldn't create shared memory segment\n"</font><font color="#007700">;<br />}<br /><br /></font><font color="#FF8000">// Get shared memory block's size<br /></font><font color="#0000BB">$shm_size </font><font color="#007700">= </font><font color="#0000BB">shmop_size</font><font color="#007700">(</font><font color="#0000BB">$shm_id</font><font color="#007700">);<br />echo </font><font color="#DD0000">"SHM Block Size: "</font><font color="#007700">.</font><font color="#0000BB">$shm_size</font><font color="#007700">. </font><font color="#DD0000">" has been created.\n"</font><font color="#007700">;<br /><br /></font><font color="#FF8000">// Lets write a test string into shared memory<br /></font><font color="#0000BB">$shm_bytes_written </font><font color="#007700">= </font><font color="#0000BB">shmop_write</font><font color="#007700">(</font><font color="#0000BB">$shm_id</font><font color="#007700">, </font><font color="#DD0000">"my shared memory block"</font><font color="#007700">, </font><font color="#0000BB">0</font><font color="#007700">);<br />if(</font><font color="#0000BB">$shm_bytes_written </font><font color="#007700">!= </font><font color="#0000BB">strlen</font><font color="#007700">(</font><font color="#DD0000">"my shared memory block"</font><font color="#007700">)) {<br />&nbsp;&nbsp;&nbsp;&nbsp;echo </font><font color="#DD0000">"Couldn't write the entire length of data\n"</font><font color="#007700">;<br />}<br /><br /></font><font color="#FF8000">// Now lets read the string back<br /></font><font color="#0000BB">$my_string </font><font color="#007700">= </font><font color="#0000BB">shmop_read</font><font color="#007700">(</font><font color="#0000BB">$shm_id</font><font color="#007700">, </font><font color="#0000BB">0</font><font color="#007700">, </font><font color="#0000BB">$shm_size</font><font color="#007700">);<br />if(!</font><font color="#0000BB">$my_string</font><font color="#007700">) {<br />&nbsp;&nbsp;&nbsp;&nbsp;echo </font><font color="#DD0000">"Couldn't read from shared memory block\n"</font><font color="#007700">;<br />}<br />echo </font><font color="#DD0000">"The data inside shared memory was: "</font><font color="#007700">.</font><font color="#0000BB">$my_string</font><font color="#007700">.</font><font color="#DD0000">"\n"</font><font color="#007700">;<br /><br /></font><font color="#FF8000">//Now lets delete the block and close the shared memory segment<br /></font><font color="#007700">if(!</font><font color="#0000BB">shmop_delete</font><font color="#007700">(</font><font color="#0000BB">$shm_id</font><font color="#007700">)) {<br />&nbsp;&nbsp;&nbsp;&nbsp;echo </font><font color="#DD0000">"Couldn't mark shared memory block for deletion."</font><font color="#007700">;<br />}<br /></font><font color="#0000BB">shmop_close</font><font color="#007700">(</font><font color="#0000BB">$shm_id</font><font color="#007700">);<br />&nbsp;&nbsp;&nbsp;<br /></font><font color="#0000BB">?&gt;</font>
</font>
</code></TD
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>
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><DT
><B
>Índice</B
></DT
><DT
><A
HREF="function.shmop-close.html"
>shmop_close</A
>&nbsp;--&nbsp;Fecha um bloco de memória compartilhada</DT
><DT
><A
HREF="function.shmop-delete.html"
>shmop_delete</A
>&nbsp;--&nbsp;Deleta um bloco de memória compartilhada</DT
><DT
><A
HREF="function.shmop-open.html"
>shmop_open</A
>&nbsp;--&nbsp;Cria ou abre um bloco de memória compartilhada</DT
><DT
><A
HREF="function.shmop-read.html"
>shmop_read</A
>&nbsp;--&nbsp;Lê dados de um bloco de memória compartilhada</DT
><DT
><A
HREF="function.shmop-size.html"
>shmop_size</A
>&nbsp;--&nbsp;Pega o tamanho do bloco de memória compartilhada </DT
><DT
><A
HREF="function.shmop-write.html"
>shmop_write</A
>&nbsp;--&nbsp;Escreve dados em um bloco de memória compartilhada</DT
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