Download Safari Books Online apps: Apple iOS | Android

Entire Site

Safari Books Online

    Free Trial

    Safari Books Online is a digital library providing on-demand subscription access to thousands of learning resources.


    Copyright
    Preface
    Pt. I. Getting Started
    Pt. II. Language Basics
    Pt. III. Modules
    Ch. 7. Packages, Modules, and Objects
    Ch. 8. Standard Modules
    AnyDBM_File
    Attribute::Handlers
    attributes
    attrs
    AutoLoader
    AutoSplit
    autouse
    B
    B::Asmdata
    B::Assembler
    B::Bblock
    B::Bytecode
    B::C
    B::CC
    B::Concise
    B::Debug
    B::Deparse
    B::Disassembler
    B::Lint
    B::Showlex
    B::Stackobj
    B::Terse
    B::Xref
    base
    Benchmark
    bigint
    bignum
    bigrat
    blib
    bytes
    ByteLoader
    Carp
    CGI
    CGI::Apache
    CGI::Carp
    CGI::Cookie
    CGI::Fast
    CGI::Pretty
    CGI::Push
    CGI::Switch
    charnames
    Class::ISA
    Class::Struct
    Config
    constant
    CPAN
    CPAN::FirstTime
    CPAN::Nox
    Cwd
    Data::Dumper
    DB
    DB_File
    Devel::DProf
    Devel::PPPort
    Devel::SelfStubber
    diagnostics
    Digest
    Digest::MD5
    DirHandle
    Dumpvalue
    DynaLoader
    encoding
    English
    Env
    Errno
    Exporter
    ExtUtils::Command
    ExtUtils::Command::MM
    ExtUtils::Constant
    ExtUtils::Embed
    ExtUtils::Install
    ExtUtils::Installed
    ExtUtils::Liblist
    ExtUtils::MakeMaker
    ExtUtils::Manifest
    ExtUtils::Miniperl
    ExtUtils::Mkbootstrap
    ExtUtils::Mksymlists
    ExtUtils::MM
    ExtUtils::MM_Any
    ExtUtils::MM_BeOS
    ExtUtils::MM_DOS
    ExtUtils::MM_NW5
    ExtUtils::MM_OS2
    ExtUtils::MM_Unix
    ExtUtils::MM_UWIN
    ExtUtils::MM_VMS
    ExtUtils::MM_Win32
    ExtUtils::MY
    ExtUtils::Packlist
    ExtUtils::testlib
    Fatal
    Fcntl
    fields
    File::Basename
    File::CheckTree
    File::Compare
    File::Copy
    File::DosGlob
    File::Find
    File::Path
    File::Spec
    File::Spec::Cygwin
    File::Spec::Mac
    File::Spec::OS2
    File::Spec::Unix
    File::Spec::VMS
    File::Spec::Win32
    File::stat
    File::Temp
    FileCache
    FileHandle
    Filter::Simple
    Filter::Util::Call
    FindBin
    GDBM_File
    Getopt::Long
    Getopt::Std
    Hash::Util
    I18N::Collate
    I18N::Langinfo
    I18N::LangTags
    I18N::LangTags::List
    if
    integer
    IO
    IO::File
    IO::Handle
    IO::Pipe
    IO::Seekable
    IO::Select
    IO::Socket
    IPC::Msg
    IPC::Open2
    IPC::Open3
    IPC::Semaphore
    IPC::SysV
    less
    lib
    List::Util
    locale
    Math::BigFloat
    Math::BigInt
    Math::BigInt::Calc
    Math::BigRat
    Math::Complex
    Math::Trig
    MIME::Base64
    MIME::QuotedPrint
    NDBM_File
    Net::Cmd
    Net::Config
    Net::Domain
    Net::FTP
    Net::hostent
    Net::netent
    Net::Netrc
    Net::NNTP
    Net::Ping
    Net::POP3
    Net::protoent
    Net::servent
    Net::SMTP
    Net::Time
    O
    ODBM_File
    Opcode
    ops
    overload
    PerlIO
    PerlIO::Scalar
    PerlIO::Via
    Pod::Functions
    Pod::Html
    Pod::ParseLink
    Pod::Text
    POSIX
    re
    Safe
    Scalar::Util
    SDBM_File
    Search::Dict
    SelectSaver
    SelfLoader
    Shell
    sigtrap
    Socket
    sort
    Storable
    strict
    subs
    Switch
    Symbol
    Sys::Hostname
    Sys::Syslog
    Term::Cap
    Term::Complete
    Term::ReadLine
    Test
    Test::Builder
    Test::Harness
    Test::More
    Test::Simple
    Text::Abbrev
    Text::Balanced
    Text::ParseWords
    Text::Soundex
    Text::Tabs
    Text::Wrap
    Thread
    Thread::Queue
    Thread::Semaphore
    new
    down
    up
    Thread::Signal
    Thread::Specific
    Tie::Array, Tie::StdArray
    Tie::File
    Tie::Handle
    Tie::Hash
    Tie::Memoize
    Tie::RefHash
    Tie::Scalar
    Tie::SubstrHash
    Time::gmtime
    Time::HiRes
    Time::Local
    Time::localtime
    Time::tm
    UNIVERSAL
    User::grent
    User::pwent
    utf8
    vars
    vmsish
    XS::Typemap
    Pt. IV. CGI
    Pt. V. Databases
    Pt. VI. XML and SOAP
    Pt. VII. Network Programming
    Pt. VIII. LWP
    Pt. IX. Perl/Tk
    Pt. X. Win32
    Colophon
    Index
    • Create BookmarkCreate Bookmark
    • Create Note or TagCreate Note or Tag
    • DownloadDownload
    • PrintPrint
    Share this Page URL
    Help

    Chapter 8. Standard Modules > Thread::Semaphore

    8.212. Thread::Semaphore

    Provides a mechanism to regulate access to resources. Semaphores are more general than locks because they aren't tied to a particular scalar. They can have values other than 0 or 1 and can be incremented or decremented by a specified number.


      

    You are currently reading a PREVIEW of this book.

                                                                                            

    Get instant access to over
    $1 million worth of books and videos.

      

    Start a Free Trial