From f0732bbcbdca67ef8f9444f2aafaf44da81c9e5a Mon Sep 17 00:00:00 2001
From: wangzhengquan <wangzhengquan85@126.com>
Date: 星期六, 01 八月 2020 16:44:00 +0800
Subject: [PATCH] update
---
src/queue/mm.c | 104 ++++++++++++++++++++++++++--------------------------
1 files changed, 52 insertions(+), 52 deletions(-)
diff --git a/src/queue/mm.c b/src/queue/mm.c
index 32ec9d4..39aca9e 100644
--- a/src/queue/mm.c
+++ b/src/queue/mm.c
@@ -324,70 +324,70 @@
/*
* mm_init - Initialize the memory manager
*/
-bool mm_init2(size_t offset, void **addr)
-{
+// bool mm_init2(size_t offset, void **addr)
+// {
- //宸茬粡鍒濆鍖栬繃浜�
- SemUtil::dec(mutex);
- if (shmid != -1){
- *addr = shmp;
- SemUtil::inc(mutex);
- return false;
- }
+// //宸茬粡鍒濆鍖栬繃浜�
+// SemUtil::dec(mutex);
+// if (shmid != -1){
+// *addr = shmp;
+// SemUtil::inc(mutex);
+// return false;
+// }
- bool first = true;
+// bool first = true;
- shmid = shmget(SHM_KEY, MAX_HEAP, IPC_CREAT | IPC_EXCL | OBJ_PERMS);
- if (shmid == -1 && errno == EEXIST) {
- first = false;
- shmid = shmget(SHM_KEY, 0, 0);
- }
- if (shmid == -1)
- err_exit(errno, "mm_init shmget");
- shmp = shmat(shmid, key_addr, 0);
- if ((long)shmp == -1)
- err_exit(errno, "mm_init shmat");
+// shmid = shmget(SHM_KEY, MAX_HEAP, IPC_CREAT | IPC_EXCL | OBJ_PERMS);
+// if (shmid == -1 && errno == EEXIST) {
+// first = false;
+// shmid = shmget(SHM_KEY, 0, 0);
+// }
+// if (shmid == -1)
+// err_exit(errno, "mm_init shmget");
+// shmp = shmat(shmid, key_addr, 0);
+// if ((long)shmp == -1)
+// err_exit(errno, "mm_init shmat");
- mem_start_brk = (void*)ALIGN((size_t)((char *)shmp + offset + ALIGNMENT));
- mem_max_addr = (void *)((char *)shmp+ MAX_HEAP);
- mem_max_size = (char *)mem_max_addr - (char*)mem_start_brk;
- mem_brk = mem_start_brk;
- void *free_listp;
- /* Create the initial empty heap */
- int initsize = ALIGN(3 * SIZE_T_SIZE + 2 * PTR_SIZE);
- heap_listp = (char *)mem_start_brk + initsize - 2 * SIZE_T_SIZE - 2 * PTR_SIZE;
+// mem_start_brk = (void*)ALIGN((size_t)((char *)shmp + offset + ALIGNMENT));
+// mem_max_addr = (void *)((char *)shmp+ MAX_HEAP);
+// mem_max_size = (char *)mem_max_addr - (char*)mem_start_brk;
+// mem_brk = mem_start_brk;
+// void *free_listp;
+// /* Create the initial empty heap */
+// int initsize = ALIGN(3 * SIZE_T_SIZE + 2 * PTR_SIZE);
+// heap_listp = (char *)mem_start_brk + initsize - 2 * SIZE_T_SIZE - 2 * PTR_SIZE;
- if(!first) {
- *addr = shmp;
- SemUtil::inc(mutex);
- return first;
- }
+// if(!first) {
+// *addr = shmp;
+// SemUtil::inc(mutex);
+// return first;
+// }
- if ((mem_sbrk(initsize)) == (void *) - 1)
- err_exit(errno, "mm_init mem_sbrk");
+// if ((mem_sbrk(initsize)) == (void *) - 1)
+// err_exit(errno, "mm_init mem_sbrk");
- PUT((char *)mem_start_brk + initsize - SIZE_T_SIZE, PACK(0, 1)); /* Epilogue header */
- /*PUT(HDRP(heap_listp), PACK(initsize - SIZE_T_SIZE, 1));
- PUT(FTRP(heap_listp), PACK(initsize - SIZE_T_SIZE, 1));*/
+// PUT((char *)mem_start_brk + initsize - SIZE_T_SIZE, PACK(0, 1)); /* Epilogue header */
+// /*PUT(HDRP(heap_listp), PACK(initsize - SIZE_T_SIZE, 1));
+// PUT(FTRP(heap_listp), PACK(initsize - SIZE_T_SIZE, 1));*/
- PUT(HDRP(heap_listp), PACK(initsize - SIZE_T_SIZE, 1));
- PUT(FTRP(heap_listp), PACK(initsize - SIZE_T_SIZE, 1));
+// PUT(HDRP(heap_listp), PACK(initsize - SIZE_T_SIZE, 1));
+// PUT(FTRP(heap_listp), PACK(initsize - SIZE_T_SIZE, 1));
- /**
- * here the heap_listp can be look as a ancher which concat the header and tail of free-list to form a ring, and the heap_list itself will never be used as a free block
- */
- PUT_PTR(SUCCRP(heap_listp), heap_listp);
- PUT_PTR(PREDRP(heap_listp), heap_listp);
- /* Extend the empty heap with a free block of CHUNKSIZE bytes */
- if ((free_listp = extend_heap(mem_max_size - initsize - ALIGNMENT)) == NULL)
- err_exit(errno, "mm_init extend_heap");
+// /**
+// * here the heap_listp can be look as a ancher which concat the header and tail of free-list to form a ring, and the heap_list itself will never be used as a free block
+// */
+// PUT_PTR(SUCCRP(heap_listp), heap_listp);
+// PUT_PTR(PREDRP(heap_listp), heap_listp);
+// /* Extend the empty heap with a free block of CHUNKSIZE bytes */
+// if ((free_listp = extend_heap(mem_max_size - initsize - ALIGNMENT)) == NULL)
+// err_exit(errno, "mm_init extend_heap");
- *addr = shmp;
- SemUtil::inc(mutex);
- return first;
-}
+// *addr = shmp;
+// SemUtil::inc(mutex);
+// return first;
+// }
--
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