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/*
PsychToolbox3/Source/Common/MachPriorityMex/MachPriorityMex.c
PLATFORMS:
OS X only.
AUTHORS:
Allen Ingling awi Allen.Ingling@nyu.edu
Mario Kleiner mk
HISTORY:
8/08/02 awi wrote it.
10/29/04 awi fixed the spelling of "MachGetPriorityMex" in help lines.
2/17/05 mk Added proper error handling/reporting.
4/6/05 awi Merged Mario Kleiner's error handling improvements into Psychtoolbox.org master.
DESCRIPTION
MachSetPriorityMex is a simplified variant of MachPriority which strips out the Psychtoolbox mex/mx abstraction layer and separates
Get from Set. See also MachGetPriorityMex
Legal calls to MachSetPriorityMex:
priority=MachSetPriorityMex(['THREAD_STANDARD_POLICY'] );
priority=MachSetPriorityMex(['THREAD_STANDARD_POLICY'], 'default');
priority=MachSetPriorityMex(['THREAD_TIME_CONSTRAINT_POLICY', 'period','computation', 'constraint', 'preemptible');
priority=MachSetPriorityMex(['THREAD_TIME_CONSTRAINT_POLICY', 'default');
priority=MachSetPriorityMex(['THREAD_PRECEDENCE_POLICY', 'importance');
priority=MachSetPriorityMex(['THREAD_PRECEDENCE_POLICY', 'default');
NOTES:
See MachGetPrioritMex.c notes section.
IMPORTANT:
We seem to be missing some free statements below.
*/
#include "MachPriorityMex.h"
void mexFunction(int nlhs, mxArray *plhs[], int nrhs, const mxArray *prhs[])
{
bool isError;
thread_policy_flavor_t flavorConstant;
int kernError;
task_t threadID;
thread_policy_t threadPolicy;
mach_msg_type_number_t policyCount, policyCountFilled;
boolean_t isDefault;
char commandString[COMMAND_STRING_LENGTH];
threadID= mach_thread_self();
kernError=0;
//get the policy flavor constant specified by the user and the getDefault argument
if(nrhs<1)
mexErrMsgTxt("MachGetPriorityMex requires at least one argument. See help MachGetPriorityMex.");
if(!mxIsChar(prhs[0]))
mexErrMsgTxt("First input argument is not a string. See help MachGetPriorityMex.");
mxGetString(prhs[0], commandString, COMMAND_STRING_LENGTH);
isError=GetFlavorConstantFromFlavorString(commandString, mxGetM(prhs[0]) * mxGetN(prhs[0]), &flavorConstant); //case sensitive.
if(isError)
mexErrMsgTxt("Unrecognized command. See help MachGetPriorityMex.");
//branch according to the first argument
switch(flavorConstant){
case THREAD_STANDARD_POLICY:
if(nrhs>2)
mexErrMsgTxt("Extra argument(s) detected. See help MachGetPriorityMex.");
if(nrhs==2){
if(!mxIsChar(prhs[1]))
mexErrMsgTxt("Expecting string in second argument. See help MachGetPriorityMex.");
mxGetString(prhs[1], commandString, COMMAND_STRING_LENGTH);
commandString[COMMAND_STRING_LENGTH-1]= '\0'; //guarantee strcmp an end of string character
if(strcmp(commandString, "default"))
mexErrMsgTxt("Unrecognized second argument. See help MachGetPriorityMex.");
}
threadPolicy=(thread_policy_t)malloc(sizeof(thread_standard_policy_data_t));
policyCount=THREAD_STANDARD_POLICY_COUNT;
policyCountFilled=policyCount;
isDefault=TRUE;
kernError=thread_policy_get(threadID, THREAD_STANDARD_POLICY, threadPolicy, &policyCountFilled, &isDefault);
if (kernError==0) kernError=thread_policy_set(threadID, THREAD_STANDARD_POLICY, threadPolicy, policyCountFilled);
break;
case THREAD_TIME_CONSTRAINT_POLICY:
if(nrhs==1)
mexErrMsgTxt("Missing argument detected. See help MachGetPriorityMex.");
else if(nrhs==2){
if(!mxIsChar(prhs[1]))
mexErrMsgTxt("Expecting string in second argument. See help MachGetPriorityMex.");
mxGetString(prhs[1], commandString, COMMAND_STRING_LENGTH);
commandString[COMMAND_STRING_LENGTH-1]= '\0'; //guarantee strcmp an end of string character
if(strcmp(commandString, "default"))
mexErrMsgTxt("Unrecognized second argument. See help MachGetPriorityMex.");
threadPolicy=(thread_policy_t)malloc(sizeof(thread_time_constraint_policy_data_t));
policyCount=THREAD_TIME_CONSTRAINT_POLICY_COUNT;
policyCountFilled=policyCount;
isDefault=TRUE;
kernError=thread_policy_get(threadID, THREAD_TIME_CONSTRAINT_POLICY, threadPolicy, &policyCountFilled, &isDefault);
if (kernError==0) kernError=thread_policy_set(threadID, THREAD_TIME_CONSTRAINT_POLICY, threadPolicy, policyCountFilled);
free((void*)threadPolicy);
break;
}else if(nrhs != 5)
mexErrMsgTxt("Incorrect number of arguments. See help MachGetPriorityMex.");
else{
if(! (mxIsDouble(prhs[1]) && mxGetM(prhs[1]) * mxGetN(prhs[1]) == 1))
mexErrMsgTxt("Expected double in second argument. See help MachSetPriorityMex.");
if(! (mxIsDouble(prhs[2]) && mxGetM(prhs[2]) * mxGetN(prhs[2]) == 1))
mexErrMsgTxt("Expected double in third argument. See help MachSetPriorityMex.");
if(! (mxIsDouble(prhs[3]) && mxGetM(prhs[3]) * mxGetN(prhs[3]) == 1))
mexErrMsgTxt("Expected double in fourth argument. See help MachGetPriorityMex.");
if(!((mxIsDouble(prhs[4]) || mxIsLogical(prhs[4])) && (mxGetM(prhs[4]) * mxGetN(prhs[4]) == 1)))
mexErrMsgTxt("Expected double or logical in fifth argument. See help MachSetPriorityMex.");
threadPolicy=(thread_policy_t)malloc(sizeof(thread_time_constraint_policy_data_t));
((thread_time_constraint_policy_t)threadPolicy)->period=(uint32_t)mxGetPr(prhs[1])[0];
((thread_time_constraint_policy_t)threadPolicy)->computation=(uint32_t)mxGetPr(prhs[2])[0];
((thread_time_constraint_policy_t)threadPolicy)->constraint=(uint32_t)mxGetPr(prhs[3])[0];
((thread_time_constraint_policy_t)threadPolicy)->preemptible= (boolean_t)(mxIsDouble(prhs[4]) ? mxGetPr(prhs[4])[0] : mxGetLogicals(prhs[4])[0]);
policyCount=THREAD_TIME_CONSTRAINT_POLICY_COUNT;
policyCountFilled=policyCount;
kernError=thread_policy_set(threadID, THREAD_TIME_CONSTRAINT_POLICY, threadPolicy, policyCountFilled);
free((void*)threadPolicy);
break;
}
case THREAD_PRECEDENCE_POLICY:
if(nrhs>2)
mexErrMsgTxt("Extra argument(s) detected. See help MachGetPriorityMex.");
if(nrhs<2)
mexErrMsgTxt("Missing argument detected. See help MachGetPriorityMex.");
if(mxIsChar(prhs[1])){ //set the default
mxGetString(prhs[1], commandString, COMMAND_STRING_LENGTH);
commandString[COMMAND_STRING_LENGTH-1]= '\0'; //guarantee strcmp an end of string character
if(strcmp(commandString, "default"))
mexErrMsgTxt("Unrecognized second argument. See help MachGetPriorityMex.");
threadPolicy=(thread_policy_t)malloc(sizeof(thread_precedence_policy_data_t));
policyCount=THREAD_PRECEDENCE_POLICY_COUNT;
policyCountFilled=policyCount;
isDefault=TRUE;
kernError=thread_policy_get(threadID, THREAD_PRECEDENCE_POLICY, threadPolicy, &policyCountFilled, &isDefault);
if (kernError==0) kernError=thread_policy_set(threadID, THREAD_PRECEDENCE_POLICY, threadPolicy, policyCountFilled);
free((void*)threadPolicy);
break;
}else if(mxIsDouble(prhs[1]) && mxGetM(prhs[1]) * mxGetN(prhs[1]) == 1){ //set a specified value
threadPolicy=(thread_policy_t)malloc(sizeof(thread_precedence_policy_data_t));
((thread_precedence_policy_t)threadPolicy)->importance=(integer_t)mxGetPr(prhs[1])[0];
policyCount=THREAD_PRECEDENCE_POLICY_COUNT;
policyCountFilled=policyCount;
kernError=thread_policy_set(threadID, THREAD_PRECEDENCE_POLICY, threadPolicy, policyCountFilled);
}
}
// Check for and report errors in thread_policy_set:
if (kernError!=0) {
mexErrMsgTxt("ERROR: Failed to set requested thread scheduling policy! thread_policy_set() failed!");
}
}
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