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Diffstat (limited to 'ace/Sched_Params.h')
| -rw-r--r-- | ace/Sched_Params.h | 158 |
1 files changed, 0 insertions, 158 deletions
diff --git a/ace/Sched_Params.h b/ace/Sched_Params.h deleted file mode 100644 index 4d95b8f1017..00000000000 --- a/ace/Sched_Params.h +++ /dev/null @@ -1,158 +0,0 @@ -/* -*- C++ -*- */ -// $Id$ - -// ============================================================================ -// -// = LIBRARY -// ACE -// -// = FILENAME -// Sched_Params.h -// -// = CREATION DATE -// 28 January 1997 -// -// = AUTHOR -// David Levine -// -// ============================================================================ - -#if !defined (ACE_SCHED_PARAMS_H) -#define ACE_SCHED_PARAMS_H - -#include "ace/OS.h" - -class ACE_Export ACE_Sched_Params - // = TITLE - // Container for scheduling-related parameters. - // - // = DESCRIPTION - // ACE_Sched_Params are passed via - // ACE_OS::sched_params () to the OS to specify scheduling - // parameters. These parameters include scheduling policy, - // such as FIFO, round-robin, or an implementation-defined - // "OTHER" (to which many systems default); priority; and - // a time-slice quantum for round-robin scheduling. - // A "scope" parameter specifies whether the ACE_Sched_Params - // applies to the current process, current lightweight process - // (LWP) (on Solaris), or current thread. Please see the "NOTE" - // below about not all combinations of parameters being legal - // on a particular platform. - // - // For the case of thread priorities, it is intended that - // ACE_OS::sched_params () usually be called from main () before - // any threads have been spawned. - // If spawned threads inherit their parent's priority (I think - // that's the default behavior for all of our platforms), then - // this sets the default base priority. Individual thread priorities - // can be adjusted as usual using ACE_OS::thr_prio () or via the - // ACE_Thread interface. See the parameter descriptions in the - // private: section below. - // - // NOTE: this class does not do any checking of parameters. - // It is just a container class. If it is constructed with values - // that are not supported on a platform, the call to - // ACE_OS::sched_params () will fail by returning -1 with EINVAL - // (available through ACE_OS::last_error ()). - - // OS Scheduling parameters are complicated and often confusing. Many - // thanks to Thilo Kielmann <kielmann@informatik.uni-siegen.de> for his - // careful review of this class design, thoughtful comments, and - // assistance with implementation, especially for PTHREADS platforms. - // Please send any comments or corrections to the ACE developers. -{ -public: - typedef int Policy; - - // = Initialization and termination methods. - ACE_Sched_Params (const Policy policy, - const ACE_Sched_Priority priority, - const int scope = ACE_SCOPE_THREAD, - const ACE_Time_Value &quantum = ACE_Time_Value::zero); - // Constructor. - - ~ACE_Sched_Params (void); - // Termination. - - // = Get/Set methods: - - // = Get/Set policy - Policy policy (void) const; - void policy (const Policy); - - // = Get/Set priority. - ACE_Sched_Priority priority (void) const; - void priority (const ACE_Sched_Priority); - - // = Get/Set scope. - int scope (void) const; - void scope(const int); - - // = Get/Set quantum. - const ACE_Time_Value &quantum (void) const; - void quantum (const ACE_Time_Value &); - - // = Accessors for OS-specific priorities. - // These return priority values for ACE_SCHED_OTHER if the Policy value - // is invalid. - static int priority_min (const Policy, - const int scope = ACE_SCOPE_THREAD); - static int priority_max (const Policy, - const int scope = ACE_SCOPE_THREAD); - - static int next_priority (const Policy, - const int priority, - const int scope = ACE_SCOPE_THREAD); - // The next higher priority. "Higher" refers to scheduling priority, - // not to the priority value itself. (On some platforms, higher scheduling - // priority is indicated by a lower priority value.) If "priority" is - // already the highest priority (for the specified policy), then it is - // returned. - - static int previous_priority (const Policy, - const int priority, - const int scope = ACE_SCOPE_THREAD); - // The previous, lower priority. "Lower" refers to scheduling priority, - // not to the priority value itself. (On some platforms, lower scheduling - // priority is indicated by a higher priority value.) If "priority" is - // already the lowest priority (for the specified policy), then it is - // returned. - -private: - Policy policy_; - // Scheduling policy. - - ACE_Sched_Priority priority_; - // Default <priority_>: for setting the priority for the process, LWP, - // or thread, as indicated by the scope_ parameter. - - int scope_; - // <scope_> must be one of the following: - // ACE_SCOPE_PROCESS: sets the scheduling policy for the - // process, and the process priority. On some platforms, - // such as Win32, the scheduling policy can _only_ be - // set at process scope. - // ACE_SCOPE_LWP: lightweight process scope, only used with - // Solaris threads. - // ACE_SCOPE_THREAD: sets the scheduling policy for the thread, - // if the OS supports it, such as with Posix threads, and the - // thread priority. - // NOTE: I don't think that these are the same as POSIX - // contention scope. POSIX users who are interested in, - // and understand, contention scope will have to set it - // by using system calls outside of ACE. - - ACE_Time_Value quantum_; - // The <quantum_> is for time slicing. An ACE_Time_Value of 0 has - // special significance: it means time-slicing is disabled; with - // that, a thread that is running on a CPU will continue to run - // until it blocks or is preempted. Currently ignored if the OS - // doesn't directly support time slicing, such as on VxWorks, or - // setting the quantum (can that be done on Win32?). -}; - -#if defined (__ACE_INLINE__) -#include "ace/Sched_Params.i" -#endif /* __ACE_INLINE__ */ - -#endif /* ACE_SCHED_PARAMS_H */ |