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view TaskManager/kernel/ppe/MailManager.cc @ 649:55f898a58748
MailManager Fifo fix
author | Shinji KONO <kono@ie.u-ryukyu.ac.jp> |
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date | Sun, 22 Nov 2009 18:53:05 +0900 |
parents | 7c9ded1ea750 |
children | c13bbb7d70b3 |
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#include <stdlib.h> #include "MailManager.h" void MailManager::calc_mask(unsigned int qsize) { mask = 1; while((qsize>>= 1)>0) { mask <<= 1; } size = mask; mask--; } MailManager::MailManager(unsigned int qsize) { calc_mask(qsize); queue = New(memaddr,size); } MailManager::~MailManager() { free(queue); } int MailManager::count() { return (write+size-read)&mask; } void MailManager::send(memaddr data) { queue[write++] = data; write &= mask; if (write==read) { memaddr *newq = New(memaddr,size*2); int i = 0; while(i<size) { newq[i++] = queue[read++]; read &= mask; } read = 0; write = i; calc_mask(size*2); free(queue); queue = newq; } } memaddr MailManager::recv() { memaddr data; if (count()>0) { data = queue[read++]; read &= mask; } else { data = 0; } return data; } /* end */