JUCE  v5.1.1-3-g1a0b28c73
JUCE API
Process Class Reference

Represents the current executable's process. More...

#include <juce_Process.h>

Public Types

enum  ProcessPriority {
  LowPriority = 0,
  NormalPriority = 1,
  HighPriority = 2,
  RealtimePriority = 3
}
 

Static Public Member Functions

static void * getCurrentModuleInstanceHandle () noexcept
 WINDOWS ONLY - This returns the HINSTANCE of the current module. More...
 
static void hide ()
 Hides the application (on an OS that supports this, e.g. More...
 
static bool isForegroundProcess ()
 Returns true if this application process is the one that the user is currently using. More...
 
static bool isRunningUnderDebugger () noexcept
 Returns true if this process is being hosted by a debugger. More...
 
static void lowerPrivilege ()
 Lowers the current process's privilege level. More...
 
static void makeForegroundProcess ()
 Attempts to make the current process the active one. More...
 
static bool openDocument (const String &documentURL, const String &parameters)
 Tries to launch the OS's default reader application for a given file or URL. More...
 
static bool openEmailWithAttachments (const String &targetEmailAddress, const String &emailSubject, const String &bodyText, const StringArray &filesToAttach)
 Tries to launch the OS's default email application to let the user create a message. More...
 
static void raisePrivilege ()
 Raises the current process's privilege level. More...
 
static void setCurrentModuleInstanceHandle (void *newHandle) noexcept
 WINDOWS ONLY - Sets a new module handle to be used by the library. More...
 
static void setDockIconVisible (bool isVisible)
 OSX ONLY - Shows or hides the OSX dock icon for this app. More...
 
static bool setMaxNumberOfFileHandles (int maxNumberOfFiles) noexcept
 UNIX ONLY - Attempts to use setrlimit to change the maximum number of file handles that the app can open. More...
 
static void setPriority (const ProcessPriority priority)
 Changes the current process's priority. More...
 
static void terminate ()
 Kills the current process immediately. More...
 

Private Member Functions

 Process ()
 

Detailed Description

Represents the current executable's process.

This contains methods for controlling the current application at the process-level.

See also
Thread, JUCEApplicationBase

Member Enumeration Documentation

◆ ProcessPriority

Enumerator
LowPriority 
NormalPriority 
HighPriority 
RealtimePriority 

Constructor & Destructor Documentation

◆ Process()

Process::Process ( )
private

Member Function Documentation

◆ getCurrentModuleInstanceHandle()

static void* Process::getCurrentModuleInstanceHandle ( )
staticnoexcept

WINDOWS ONLY - This returns the HINSTANCE of the current module.

The return type is a void* to avoid being dependent on windows.h - just cast it to a HINSTANCE to use it.

In a normal JUCE application, this will be automatically set to the module handle of the executable.

If you've built a DLL and plan to use any JUCE messaging or windowing classes, you'll need to make sure you call the setCurrentModuleInstanceHandle() to provide the correct module handle in your DllMain() function, because the system relies on the correct instance handle when opening windows.

Referenced by HiddenMessageWindow::HiddenMessageWindow(), VideoComponent::Pimpl::DirectShowContext::NativeWindowClass::juce_DeclareSingleton_SingleThreaded_Minimal(), VideoComponent::Pimpl::DirectShowContext::NativeWindow::NativeWindow(), and VideoComponent::Pimpl::DirectShowContext::NativeWindowClass::~NativeWindowClass().

◆ hide()

static void Process::hide ( )
static

Hides the application (on an OS that supports this, e.g.

OSX)

◆ isForegroundProcess()

static bool Process::isForegroundProcess ( )
static

Returns true if this application process is the one that the user is currently using.

◆ isRunningUnderDebugger()

static bool Process::isRunningUnderDebugger ( )
staticnoexcept

Returns true if this process is being hosted by a debugger.

◆ lowerPrivilege()

static void Process::lowerPrivilege ( )
static

Lowers the current process's privilege level.

Does nothing if this isn't supported by the current OS, or if process privilege level is fixed.

◆ makeForegroundProcess()

static void Process::makeForegroundProcess ( )
static

Attempts to make the current process the active one.

(This is not possible on some platforms).

◆ openDocument()

static bool Process::openDocument ( const String documentURL,
const String parameters 
)
static

Tries to launch the OS's default reader application for a given file or URL.

◆ openEmailWithAttachments()

static bool Process::openEmailWithAttachments ( const String targetEmailAddress,
const String emailSubject,
const String bodyText,
const StringArray filesToAttach 
)
static

Tries to launch the OS's default email application to let the user create a message.

◆ raisePrivilege()

static void Process::raisePrivilege ( )
static

Raises the current process's privilege level.

Does nothing if this isn't supported by the current OS, or if process privilege level is fixed.

◆ setCurrentModuleInstanceHandle()

static void Process::setCurrentModuleInstanceHandle ( void *  newHandle)
staticnoexcept

WINDOWS ONLY - Sets a new module handle to be used by the library.

The parameter type is a void* to avoid being dependent on windows.h, but it actually expects a HINSTANCE value.

See also
getCurrentModuleInstanceHandle()

◆ setDockIconVisible()

static void Process::setDockIconVisible ( bool  isVisible)
static

OSX ONLY - Shows or hides the OSX dock icon for this app.

◆ setMaxNumberOfFileHandles()

bool Process::setMaxNumberOfFileHandles ( int  maxNumberOfFiles)
staticnoexcept

UNIX ONLY - Attempts to use setrlimit to change the maximum number of file handles that the app can open.

Pass 0 or less as the parameter to mean 'infinite'. Returns true if it succeeds.

Referenced by MaxNumFileHandlesInitialiser::MaxNumFileHandlesInitialiser().

◆ setPriority()

static void Process::setPriority ( const ProcessPriority  priority)
static

Changes the current process's priority.

Parameters
prioritythe process priority, where 0=low, 1=normal, 2=high, 3=realtime

◆ terminate()

void Process::terminate ( )
static

Kills the current process immediately.

This is an emergency process terminator that kills the application immediately - it's intended only for use only when something goes horribly wrong.

See also
JUCEApplicationBase::quit

The documentation for this class was generated from the following files: