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view gsm-fw/nucleus/pmc.c @ 1000:36e3f6bf0156
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| author | Mychaela Falconia <falcon@ivan.Harhan.ORG> |
|---|---|
| date | Sun, 06 Mar 2016 21:38:21 +0000 |
| parents | afceeeb2cba1 |
| children |
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/*************************************************************************/ /* */ /* Copyright Mentor Graphics Corporation 2002 */ /* All Rights Reserved. */ /* */ /* THIS WORK CONTAINS TRADE SECRET AND PROPRIETARY INFORMATION WHICH IS */ /* THE PROPERTY OF MENTOR GRAPHICS CORPORATION OR ITS LICENSORS AND IS */ /* SUBJECT TO LICENSE TERMS. */ /* */ /*************************************************************************/ /*************************************************************************/ /* */ /* FILE NAME VERSION */ /* */ /* pmc.c Nucleus PLUS 1.14 */ /* */ /* COMPONENT */ /* */ /* PM - Partition Memory Management */ /* */ /* DESCRIPTION */ /* */ /* This file contains the core routines for the Partition Memory */ /* Management component. */ /* */ /* DATA STRUCTURES */ /* */ /* None */ /* */ /* FUNCTIONS */ /* */ /* PMC_Create_Partition_Pool Create a Partition Pool */ /* PMC_Delete_Partition_Pool Delete a Partition Pool */ /* PMC_Allocate_Partition Allocate a partition from a */ /* pool */ /* PMC_Deallocate_Partition Deallocate a partition from */ /* a pool */ /* PMC_Cleanup Cleanup on timeout or a */ /* terminate condition */ /* */ /* DEPENDENCIES */ /* */ /* cs_extr.h Common Service functions */ /* tc_extr.h Thread Control functions */ /* pm_extr.h Partition functions */ /* hi_extr.h History functions */ /* */ /* HISTORY */ /* */ /* DATE REMARKS */ /* */ /* 03-01-1993 Created initial version 1.0 */ /* 04-19-1993 Verified version 1.0 */ /* 08-09-1993 Corrected pointer retrieval */ /* loop, resulting in version 1.0a */ /* 08-09-1993 Verified version 1.0a */ /* 03-01-1994 Moved non-core functions into */ /* supplemental files, changed */ /* function interfaces to match */ /* those in prototype, added */ /* register options, changed */ /* protection logic to reduce */ /* overhead, resulting in */ /* version 1.1 */ /* */ /* 03-18-1994 Verified version 1.1 */ /* 04-17-1996 updated to version 1.2 */ /* 03-24-1998 Released version 1.3 */ /* 03-26-1999 Released 1.11m (new release */ /* numbering scheme) */ /* 04-17-2002 Released version 1.13m */ /* 11-07-2002 Released version 1.14 */ /*************************************************************************/ #define NU_SOURCE_FILE #include "cs_extr.h" /* Common service functions */ #include "tc_extr.h" /* Thread control functions */ #include "pm_extr.h" /* Partition functions */ #include "hi_extr.h" /* History functions */ #include "profiler.h" /* ProView interface */ /* Define external inner-component global data references. */ extern CS_NODE *PMD_Created_Pools_List; extern UNSIGNED PMD_Total_Pools; extern TC_PROTECT PMD_List_Protect; /* Define internal component function prototypes. */ VOID PMC_Cleanup(VOID *information); /*************************************************************************/ /* */ /* FUNCTION */ /* */ /* PMC_Create_Partition_Pool */ /* */ /* DESCRIPTION */ /* */ /* This function creates a memory partition pool and then places it */ /* on the list of created partition pools. */ /* */ /* CALLED BY */ /* */ /* Application */ /* PMCE_Create_Partition_Pool Error checking shell */ /* */ /* CALLS */ /* */ /* CSC_Place_On_List Add node to linked-list */ /* [HIC_Make_History_Entry] Make entry in history log */ /* [TCT_Check_Stack] Stack checking function */ /* TCT_Protect Data structure protect */ /* TCT_Unprotect Un-protect data structure */ /* */ /* INPUTS */ /* */ /* pool_ptr Partition pool control block */ /* pointer */ /* name Partition pool name */ /* start_address Starting address of the pool */ /* pool_size Number of bytes in the pool */ /* partition_size Number of bytes in each */ /* partition of the pool */ /* suspend_type Suspension type */ /* */ /* OUTPUTS */ /* */ /* NU_SUCCESS */ /* */ /* HISTORY */ /* */ /* DATE REMARKS */ /* */ /* 03-01-1993 Created initial version 1.0 */ /* 04-19-1993 Verified version 1.0 */ /* 03-01-1994 Changed function interfaces to */ /* match those in prototype, */ /* added register options, */ /* resulting in version 1.1 */ /* */ /* 03-18-1994 Verified version 1.1 */ /* */ /*************************************************************************/ STATUS PMC_Create_Partition_Pool(NU_PARTITION_POOL *pool_ptr, CHAR *name, VOID *start_address, UNSIGNED pool_size, UNSIGNED partition_size, OPTION suspend_type) { R1 PM_PCB *pool; /* Pool control block ptr */ INT i; /* Working index variable */ BYTE_PTR pointer; /* Working byte pointer */ PM_HEADER *header_ptr; /* Partition block header ptr*/ NU_SUPERV_USER_VARIABLES /* Switch to supervisor mode */ NU_SUPERVISOR_MODE(); /* Move input pool pointer into internal pointer. */ pool = (PM_PCB *) pool_ptr; #ifdef NU_ENABLE_STACK_CHECK /* Call stack checking function to check for an overflow condition. */ TCT_Check_Stack(); #endif #ifdef NU_ENABLE_HISTORY /* Make an entry that corresponds to this function in the system history log. */ HIC_Make_History_Entry(NU_CREATE_PARTITION_POOL_ID, (UNSIGNED) pool, (UNSIGNED) name, (UNSIGNED) start_address); #endif /* First, clear the partition pool ID just in case it is an old pool control block. */ pool -> pm_id = 0; /* Fill in the partition pool name. */ for (i = 0; i < NU_MAX_NAME; i++) pool -> pm_name[i] = name[i]; /* Save the starting address and size parameters in the partition control block. */ pool -> pm_start_address = start_address; pool -> pm_pool_size = pool_size; pool -> pm_partition_size = partition_size; /* Setup the partition pool suspension type. */ if (suspend_type == NU_FIFO) /* FIFO suspension is selected, setup the flag accordingly. */ pool -> pm_fifo_suspend = NU_TRUE; else /* Priority suspension is selected. */ pool -> pm_fifo_suspend = NU_FALSE; /* Clear the suspension list pointer. */ pool -> pm_suspension_list = NU_NULL; /* Clear the number of tasks waiting on the partition pool. */ pool -> pm_tasks_waiting = 0; /* Initialize link pointers. */ pool -> pm_created.cs_previous = NU_NULL; pool -> pm_created.cs_next = NU_NULL; /* Initialize the partition parameters. */ pool -> pm_available = 0; pool -> pm_allocated = 0; pool -> pm_available_list = NU_NULL; /* Convert the supplied partition size into something that is evenly divisible by the sizeof an UNSIGNED data element. This insures UNSIGNED alignment. */ partition_size = ((partition_size + sizeof(UNSIGNED) - 1)/sizeof(UNSIGNED)) * sizeof(UNSIGNED); /* Loop to build and link as many partitions as possible from within the specified memory area. */ pointer = (BYTE_PTR) start_address; while (pool_size >= (PM_OVERHEAD + partition_size)) { /* There is room for another partition. */ /* Cast the current pointer variable to a header pointer. */ header_ptr = (PM_HEADER *) pointer; /* Now, build a header and link it into the partition pool available list- at the front. */ header_ptr -> pm_partition_pool = pool; header_ptr -> pm_next_available = pool -> pm_available_list; pool -> pm_available_list = header_ptr; /* Increment the number of partitions available in the pool. */ pool -> pm_available++; /* Decrement the number of bytes remaining in the pool. */ pool_size = pool_size - (PM_OVERHEAD + partition_size); /* Increment the working pointer to the next partition position. */ pointer = pointer + (PM_OVERHEAD + partition_size); } /* Protect against access to the list of created partition pools. */ TCT_Protect(&PMD_List_Protect); /* At this point the partition pool is completely built. The ID can now be set and it can be linked into the created partition pool list. */ pool -> pm_id = PM_PARTITION_ID; /* Link the partition pool into the list of created partition pools and increment the total number of pools in the system. */ CSC_Place_On_List(&PMD_Created_Pools_List, &(pool -> pm_created)); PMD_Total_Pools++; #ifdef INCLUDE_PROVIEW _RTProf_DumpPartitionPool(RT_PROF_CREATE_PARTITION_POOL,pool,RT_PROF_OK); #endif /* INCLUDE_PROVIEW */ /* Release protection against access to the list of created partition pools. */ TCT_Unprotect(); /* Return to user mode */ NU_USER_MODE(); /* Return successful completion. */ return(NU_SUCCESS); } /*************************************************************************/ /* */ /* FUNCTION */ /* */ /* PMC_Delete_Partition_Pool */ /* */ /* DESCRIPTION */ /* */ /* This function deletes a memory partition pool and removes it from*/ /* the list of created partition pools. All tasks suspended on the */ /* partition pool are resumed with the appropriate error status. */ /* Note that this function does not free any memory associated with */ /* either the pool area or the pool control block. */ /* */ /* CALLED BY */ /* */ /* Application */ /* PMCE_Delete_Partition_Pool Error checking shell */ /* */ /* CALLS */ /* */ /* CSC_Remove_From_List Remove node from list */ /* [HIC_Make_History_Entry] Make entry in history log */ /* TCC_Resume_Task Resume a suspended task */ /* [TCT_Check_Stack] Stack checking function */ /* TCT_Control_To_System Transfer control to system */ /* TCT_Protect Protect created list */ /* TCT_Set_Current_Protect Modify current protection */ /* TCT_System_Protect Setup system protection */ /* TCT_System_Unprotect Release system protection */ /* TCT_Unprotect Release protection */ /* */ /* INPUTS */ /* */ /* pool_ptr Partition pool control block */ /* pointer */ /* */ /* OUTPUTS */ /* */ /* NU_SUCCESS */ /* */ /* HISTORY */ /* */ /* DATE REMARKS */ /* */ /* 03-01-1993 Created initial version 1.0 */ /* 04-19-1993 Verified version 1.0 */ /* 03-01-1994 Changed function interfaces to */ /* match those in prototype, */ /* added register options, changed */ /* protection logic to reduce */ /* overhead, resulting in */ /* version 1.1 */ /* */ /* 03-18-1994 Verified version 1.1 */ /* */ /*************************************************************************/ STATUS PMC_Delete_Partition_Pool(NU_PARTITION_POOL *pool_ptr) { R1 PM_PCB *pool; /* Pool control block ptr */ PM_SUSPEND *suspend_ptr; /* Suspend block pointer */ PM_SUSPEND *next_ptr; /* Next suspend block */ STATUS preempt; /* Status for resume call */ NU_SUPERV_USER_VARIABLES /* Switch to supervisor mode */ NU_SUPERVISOR_MODE(); /* Move input pool pointer into internal pointer. */ pool = (PM_PCB *) pool_ptr; #ifdef NU_ENABLE_STACK_CHECK /* Call stack checking function to check for an overflow condition. */ TCT_Check_Stack(); #endif #ifdef NU_ENABLE_HISTORY /* Make an entry that corresponds to this function in the system history log. */ HIC_Make_History_Entry(NU_DELETE_PARTITION_POOL_ID, (UNSIGNED) pool, (UNSIGNED) 0, (UNSIGNED) 0); #endif /* Protect against simultaneous access to the partition pool. */ TCT_System_Protect(); #ifdef INCLUDE_PROVIEW _RTProf_DumpPartitionPool(RT_PROF_DELETE_PARTITION_POOL,pool,RT_PROF_OK); #endif /* INCLUDE_PROVIEW */ /* Clear the partition pool ID. */ pool -> pm_id = 0; /* Release protection. */ TCT_Unprotect(); /* Protect against access to the list of created partition pools. */ TCT_Protect(&PMD_List_Protect); /* Remove the partition pool from the list of created partition pools. */ CSC_Remove_From_List(&PMD_Created_Pools_List, &(pool -> pm_created)); /* Decrement the total number of created partition pools. */ PMD_Total_Pools--; /* Pickup the suspended task pointer list. */ suspend_ptr = pool -> pm_suspension_list; /* Walk the chain task(s) currently suspended on the partition pool. */ preempt = 0; while (suspend_ptr) { /* Protect against system access. */ TCT_System_Protect(); /* Resume the suspended task. Insure that the status returned is NU_POOL_DELETED. */ suspend_ptr -> pm_return_pointer = NU_NULL; suspend_ptr -> pm_return_status = NU_POOL_DELETED; /* Point to the next suspend structure in the link. */ next_ptr = (PM_SUSPEND *) (suspend_ptr -> pm_suspend_link.cs_next); /* Resume the specified task. */ preempt = preempt | TCC_Resume_Task((NU_TASK *) suspend_ptr -> pm_suspended_task, NU_PARTITION_SUSPEND); /* Determine if the next is the same as the current pointer. */ if (next_ptr == pool -> pm_suspension_list) /* Clear the suspension pointer to signal the end of the list traversal. */ suspend_ptr = NU_NULL; else /* Move the next pointer into the suspend block pointer. */ suspend_ptr = next_ptr; /* Modify current protection. */ TCT_Set_Current_Protect(&PMD_List_Protect); /* Clear the system protection. */ TCT_System_Unprotect(); } /* Determine if preemption needs to occur. */ if (preempt) /* Transfer control to system to facilitate preemption. */ TCT_Control_To_System(); /* Release protection against access to the list of created partition pools. */ TCT_Unprotect(); /* Return to user mode */ NU_USER_MODE(); /* Return a successful completion. */ return(NU_SUCCESS); } /*************************************************************************/ /* */ /* FUNCTION */ /* */ /* PMC_Allocate_Partition */ /* */ /* DESCRIPTION */ /* */ /* This function allocates a memory partition from the specified */ /* memory partition pool. If a memory partition is currently */ /* available, this function is completed immediately. Otherwise, */ /* if there are no partitions currently available, suspension is */ /* possible. */ /* */ /* CALLED BY */ /* */ /* Application */ /* PMCE_Allocate_Partition Error checking shell */ /* */ /* CALLS */ /* */ /* CSC_Place_On_List Place on suspend list */ /* CSC_Priority_Place_On_List Place on priority list */ /* [HIC_Make_History_Entry] Make entry in history log */ /* TCC_Suspend_Task Suspend calling task */ /* TCC_Task_Priority Pickup task's priority */ /* [TCT_Check_Stack] Stack checking function */ /* TCT_Current_Thread Pickup current thread pointer*/ /* TCT_System_Protect Protect partition pool */ /* TCT_Unprotect Release protection */ /* */ /* INPUTS */ /* */ /* pool_ptr Memory partition pool pointer*/ /* return_pointer Pointer to the destination */ /* memory pointer */ /* suspend Suspension option if full */ /* */ /* OUTPUTS */ /* */ /* NU_SUCCESS If service is successful */ /* NU_NO_PARTITION No partitions are available */ /* NU_TIMEOUT If timeout on service */ /* NU_POOL_DELETED If partition pool deleted */ /* during suspension */ /* */ /* HISTORY */ /* */ /* DATE REMARKS */ /* */ /* 03-01-1993 Created initial version 1.0 */ /* 04-19-1993 Verified version 1.0 */ /* 03-01-1994 Changed function interfaces to */ /* match those in prototype, */ /* added register options, changed */ /* protection logic to reduce */ /* overhead, resulting in */ /* version 1.1 */ /* */ /* 03-18-1994 Verified version 1.1 */ /* */ /*************************************************************************/ STATUS PMC_Allocate_Partition(NU_PARTITION_POOL *pool_ptr, VOID **return_pointer, UNSIGNED suspend) { R1 PM_PCB *pool; /* Pool control block ptr */ R2 PM_SUSPEND *suspend_ptr; /* Suspend block pointer */ PM_SUSPEND suspend_block; /* Allocate suspension block */ R3 PM_HEADER *partition_ptr; /* Pointer to partition */ TC_TCB *task; /* Task pointer */ STATUS status; /* Completion status */ NU_SUPERV_USER_VARIABLES /* Switch to supervisor mode */ NU_SUPERVISOR_MODE(); /* Move input pool pointer into internal pointer. */ pool = (PM_PCB *) pool_ptr; #ifdef NU_ENABLE_STACK_CHECK /* Call stack checking function to check for an overflow condition. */ TCT_Check_Stack(); #endif #ifdef NU_ENABLE_HISTORY /* Make an entry that corresponds to this function in the system history log. */ HIC_Make_History_Entry(NU_ALLOCATE_PARTITION_ID, (UNSIGNED) pool, (UNSIGNED) return_pointer, (UNSIGNED) suspend); #endif /* Initialize the status as successful. */ status = NU_SUCCESS; /* Protect against simultaneous access to the partition pool. */ TCT_System_Protect(); /* Determine if there is an available memory partition. */ if (pool -> pm_available) { /* Partition available. */ /* Decrement the available count. */ pool -> pm_available--; /* Increment the allocated count. */ pool -> pm_allocated++; /* Unlink the first memory partition and return the pointer to the caller. */ partition_ptr = pool -> pm_available_list; pool -> pm_available_list = partition_ptr -> pm_next_available; partition_ptr -> pm_next_available = NU_NULL; /* Return a memory address to the caller. */ *return_pointer = (VOID *) (((BYTE_PTR) partition_ptr) + PM_OVERHEAD); #ifdef INCLUDE_PROVIEW _RTProf_DumpPartitionPool(RT_PROF_ALLOCATE_PARTITION,pool,RT_PROF_OK); #endif /* INCLUDE_PROVIEW */ } else { /* A partition is not available. Determine if suspension is required. */ if (suspend) { /* Suspension is selected. */ /* Increment the number of tasks waiting. */ pool -> pm_tasks_waiting++; #ifdef INCLUDE_PROVIEW _RTProf_DumpPartitionPool(RT_PROF_ALLOCATE_PARTITION,pool,RT_PROF_WAIT); #endif /* INCLUDE_PROVIEW */ /* Setup the suspend block and suspend the calling task. */ suspend_ptr = &suspend_block; suspend_ptr -> pm_partition_pool = pool; suspend_ptr -> pm_suspend_link.cs_next = NU_NULL; suspend_ptr -> pm_suspend_link.cs_previous = NU_NULL; task = (TC_TCB *) TCT_Current_Thread(); suspend_ptr -> pm_suspended_task = task; /* Determine if priority or FIFO suspension is associated with the partition pool. */ if (pool -> pm_fifo_suspend) { /* FIFO suspension is required. Link the suspend block into the list of suspended tasks on this partition pool. */ CSC_Place_On_List((CS_NODE **) &(pool -> pm_suspension_list), &(suspend_ptr -> pm_suspend_link)); } else { /* Get the priority of the current thread so the suspend block can be placed in the appropriate place. */ suspend_ptr -> pm_suspend_link.cs_priority = TCC_Task_Priority(task); CSC_Priority_Place_On_List((CS_NODE **) &(pool -> pm_suspension_list), &(suspend_ptr -> pm_suspend_link)); } /* Finally, suspend the calling task. Note that the suspension call automatically clears the protection on the partition pool. */ TCC_Suspend_Task((NU_TASK *) task, NU_PARTITION_SUSPEND, PMC_Cleanup, suspend_ptr, suspend); /* Pickup the return status. */ status = suspend_ptr -> pm_return_status; *return_pointer = suspend_ptr -> pm_return_pointer; } else { /* No suspension requested. Simply return an error status. */ status = NU_NO_PARTITION; #ifdef INCLUDE_PROVIEW _RTProf_DumpPartitionPool(RT_PROF_ALLOCATE_PARTITION,pool,RT_PROF_FAIL); #endif /* INCLUDE_PROVIEW */ } } /* Release protection of the partition pool. */ TCT_Unprotect(); /* Return to user mode */ NU_USER_MODE(); /* Return the completion status. */ return(status); } /*************************************************************************/ /* */ /* FUNCTION */ /* */ /* PMC_Deallocate_Partition */ /* */ /* DESCRIPTION */ /* */ /* This function deallocates a previously allocated partition. If */ /* there is a task waiting for a partition, the partition is simply */ /* given to the waiting task and the waiting task is resumed. */ /* Otherwise, the partition is returned to the partition pool. */ /* */ /* CALLED BY */ /* */ /* Application */ /* PMCE_Deallocate_Partition Error checking shell */ /* */ /* CALLS */ /* */ /* CSC_Remove_From_List Remove from suspend list */ /* [HIC_Make_History_Entry] Make entry in history log */ /* TCC_Resume_Task Resume a suspended task */ /* [TCT_Check_Stack] Stack checking function */ /* TCT_Control_To_System Transfer control to system */ /* TCT_System_Protect Protect partition pool */ /* TCT_Unprotect Release protection */ /* */ /* INPUTS */ /* */ /* partition Pointer to partition memory */ /* */ /* OUTPUTS */ /* */ /* NU_SUCCESS */ /* */ /* HISTORY */ /* */ /* DATE REMARKS */ /* */ /* 03-01-1993 Created initial version 1.0 */ /* 04-19-1993 Verified version 1.0 */ /* 03-01-1994 Added register options, changed */ /* protection logic to reduce */ /* overhead, resulting in */ /* version 1.1 */ /* */ /* 03-18-1994 Verified version 1.1 */ /* */ /*************************************************************************/ STATUS PMC_Deallocate_Partition(VOID *partition) { R1 PM_PCB *pool; /* Pool pointer */ R3 PM_SUSPEND *suspend_ptr; /* Pointer to suspend block */ R2 PM_HEADER *header_ptr; /* Pointer to partition hdr */ STATUS preempt; /* Preemption flag */ STATUS status; /* Completion status */ NU_SUPERV_USER_VARIABLES /* Switch to supervisor mode */ NU_SUPERVISOR_MODE(); #ifdef NU_ENABLE_STACK_CHECK /* Call stack checking function to check for an overflow condition. */ TCT_Check_Stack(); #endif #ifdef NU_ENABLE_HISTORY /* Make an entry that corresponds to this function in the system history log. */ HIC_Make_History_Entry(NU_DEALLOCATE_PARTITION_ID, (UNSIGNED) partition, (UNSIGNED) 0, (UNSIGNED) 0); #endif /* Initialize the status as successful. */ status = NU_SUCCESS; /* Pickup the associated pool's pointer. It is inside the header of each partition. */ header_ptr = (PM_HEADER *) (((BYTE_PTR) partition) - PM_OVERHEAD); pool = header_ptr -> pm_partition_pool; /* Protect against simultaneous access to the partition pool. */ TCT_System_Protect(); /* Determine if another task is waiting for a partition from the pool. */ if (pool -> pm_tasks_waiting) { /* Yes, another task is waiting for a partition from the pool. */ /* Decrement the number of tasks waiting counter. */ pool -> pm_tasks_waiting--; #ifdef INCLUDE_PROVIEW _RTProf_DumpPartitionPool(RT_PROF_DEALLOCATE_PARTITION,pool,RT_PROF_OK); #endif /* INCLUDE_PROVIEW */ /* Remove the first suspended block from the list. */ suspend_ptr = pool -> pm_suspension_list; CSC_Remove_From_List((CS_NODE **) &(pool -> pm_suspension_list), &(suspend_ptr -> pm_suspend_link)); /* Setup the appropriate return value. */ suspend_ptr -> pm_return_status = NU_SUCCESS; suspend_ptr -> pm_return_pointer = partition; /* Resume the suspended task. */ preempt = TCC_Resume_Task((NU_TASK *) suspend_ptr -> pm_suspended_task, NU_PARTITION_SUSPEND); /* Determine if a preempt condition is present. */ if (preempt) /* Transfer control to the system if the resumed task function detects a preemption condition. */ TCT_Control_To_System(); } else { /* Increment the available partitions counter. */ pool -> pm_available++; /* Decrement the allocated partitions counter. */ pool -> pm_allocated--; /* Place the partition back on the available list. */ header_ptr -> pm_next_available = pool -> pm_available_list; pool -> pm_available_list = header_ptr; #ifdef INCLUDE_PROVIEW _RTProf_DumpPartitionPool(RT_PROF_DEALLOCATE_PARTITION,pool,RT_PROF_OK); #endif /* INCLUDE_PROVIEW */ } /* Release protection of the partition pool. */ TCT_Unprotect(); /* Return to user mode */ NU_USER_MODE(); /* Return the completion status. */ return(status); } /*************************************************************************/ /* */ /* FUNCTION */ /* */ /* PMC_Cleanup */ /* */ /* DESCRIPTION */ /* */ /* This function is responsible for removing a suspension block */ /* from a partition pool. It is not called unless a timeout or */ /* a task terminate is in progress. Note that protection is */ /* already in effect - the same protection at suspension time. */ /* */ /* CALLED BY */ /* */ /* TCC_Timeout Task timeout */ /* TCC_Terminate Task terminate */ /* */ /* CALLS */ /* */ /* CSC_Remove_From_List Remove suspend block from */ /* the suspension list */ /* */ /* INPUTS */ /* */ /* information Pointer to suspend block */ /* */ /* OUTPUTS */ /* */ /* None */ /* */ /* HISTORY */ /* */ /* DATE REMARKS */ /* */ /* 03-01-1993 Created initial version 1.0 */ /* 04-19-1993 Verified version 1.0 */ /* */ /*************************************************************************/ VOID PMC_Cleanup(VOID *information) { PM_SUSPEND *suspend_ptr; /* Suspension block pointer */ NU_SUPERV_USER_VARIABLES /* Switch to supervisor mode */ NU_SUPERVISOR_MODE(); /* Use the information pointer as a suspend pointer. */ suspend_ptr = (PM_SUSPEND *) information; /* By default, indicate that the service timed-out. It really does not matter if this function is called from a terminate request since the task does not resume. */ suspend_ptr -> pm_return_status = NU_TIMEOUT; suspend_ptr -> pm_return_pointer = NU_NULL; /* Decrement the number of tasks waiting counter. */ (suspend_ptr -> pm_partition_pool) -> pm_tasks_waiting--; /* Unlink the suspend block from the suspension list. */ CSC_Remove_From_List((CS_NODE **) &((suspend_ptr -> pm_partition_pool) -> pm_suspension_list), &(suspend_ptr -> pm_suspend_link)); /* Return to user mode */ NU_USER_MODE(); }