12 <concept xml:lang="en" id="GUID-5D4B86D3-20C4-5D87-A6C1-225018D32347"><title>Thread And Process Management Overview</title><prolog><metadata><keywords/></metadata></prolog><conbody><section><title>Purpose</title> <p>Provides access to processes, threads, thread-local storage, and access synchronisation.</p> <p>These APIs provide support for a programming style that employs multiple threads or processes that share resource protected by synchronisation mechanisms such as mutexes. Symbian OS provides alternatives to this style that are better suited to a limited resource environment:</p> <ul><li id="GUID-92461334-670A-58ED-9EB5-DA89FE0599FD"><p>the active objects framework provided by the Asynchronous Services API is usually preferred to multi-threading in Symbian OS programming</p> </li> <li id="GUID-8EE9253F-9F9A-5A92-B188-0F67807AC3C6"><p>server programs can be used to serialise access to a shared resource</p> </li> </ul> </section> <section><title>Description</title> <p>Functionality is provided by a number of APIs. Use them as follows:</p> <p><xref href="GUID-547CF71C-6A62-57C0-A9BE-E76B4286C6D6.dita">Threads And Processes Overview</xref> </p> <p>Provides access to processes, threads, and thread-local storage.</p> <p><xref href="GUID-E865E677-1219-500C-89CF-0A2835B91834.dita">Semaphores Overview</xref> </p> <p>Synchronises access to shared resources within and between processes. </p> <p><xref href="GUID-BA89F4DF-E2F6-5E0B-BF20-F8898FC5D5F8.dita">Mutexes Overview</xref> </p> <p>Synchronises exclusive access to shared resources within and between processes.</p> <p><xref href="GUID-B1C0C5E2-DC8D-5230-8D4B-338DF619F1D2.dita">Critical Sections Overview</xref> </p> <p>Synchronises exclusive access to shared resources within a single process. </p> </section> <section><title>See also</title> <p><xref href="GUID-1294F540-FDA7-5050-BAFB-3C9888491B98.dita">Asynchronous Services Overview</xref> </p> <p><xref href="GUID-D0D27AEA-FDDB-5F6F-94F6-ADDF5910DC47.dita">Client/Server Overview</xref> </p> <p><xref href="GUID-FF8F5D97-7D37-5F6B-84A3-C064E2FD53E0.dita">System Static Functions Overview</xref> </p> </section> </conbody></concept>

    12 <concept id="GUID-5D4B86D3-20C4-5D87-A6C1-225018D32347" xml:lang="en"><title>Thread

    13 And Process Management Overview</title><shortdesc>This document provides an overview of thread and process management.</shortdesc><prolog><metadata><keywords/></metadata></prolog><conbody>

    14 <section id="GUID-868C1AFC-278F-4A51-BFBE-33C7280367DE"><title>Purpose</title> <p>Provides access to processes, threads,

    15 thread-local storage, and access synchronisation.</p> <p>These APIs provide

    16 support for a programming style that employs multiple threads or processes

    17 that share resource protected by synchronisation mechanisms such as mutexes.

    18 Symbian platform provides alternatives to this style that are better suited

    19 to a limited resource environment:</p> <ul>

    20 <li id="GUID-92461334-670A-58ED-9EB5-DA89FE0599FD"><p>the active objects framework

    21 provided by the Asynchronous Services API is usually preferred to multi-threading

    22 in Symbian platform programming</p> </li>

    23 <li id="GUID-8EE9253F-9F9A-5A92-B188-0F67807AC3C6"><p>server programs can

    24 be used to serialise access to a shared resource</p> </li>

    25 </ul> </section>

    26 <section id="GUID-506E7443-F94D-473A-99B8-B13B1973DEDF"><title>Description</title> <p>Functionality is provided by a number

    27 of APIs. Use them as follows:</p> <p><xref href="GUID-547CF71C-6A62-57C0-A9BE-E76B4286C6D6.dita">Threads

    28 And Processes Overview</xref> </p> <p>Provides access to processes, threads,

    29 and thread-local storage.</p> <p><xref href="GUID-E865E677-1219-500C-89CF-0A2835B91834.dita">Semaphores

    30 Overview</xref> </p> <p>Synchronises access to shared resources within and

    31 between processes. </p> <p><xref href="GUID-BA89F4DF-E2F6-5E0B-BF20-F8898FC5D5F8.dita">Mutexes

    32 Overview</xref> </p> <p>Synchronises exclusive access to shared resources

    33 within and between processes.</p> <p><xref href="GUID-B1C0C5E2-DC8D-5230-8D4B-338DF619F1D2.dita">Critical

    34 Sections Overview</xref> </p> <p>Synchronises exclusive access to shared resources

    35 within a single process. </p> </section>

    36 <section id="GUID-B2E12F2E-2FDB-4149-B7B3-0C5F3029A70D"><title>See also</title> <p><xref href="GUID-1294F540-FDA7-5050-BAFB-3C9888491B98.dita">Asynchronous

    37 Services Overview</xref> </p> <p><xref href="GUID-D0D27AEA-FDDB-5F6F-94F6-ADDF5910DC47.dita">Client/Server

    38 Overview</xref> </p> <p><xref href="GUID-FF8F5D97-7D37-5F6B-84A3-C064E2FD53E0.dita">System

    39 Static Functions Overview</xref> </p> </section>

    40 </conbody></concept>