PART 11: Memory layout

宏定义
#define	zeroglue   MEM_BOT
	[#162] specification for 0pt plus 0pt minus 0pt. 更多...
#define	filglue   (zeroglue + gluespecsize)
	[#162] 0pt plus 1fil minus 0pt. 更多...
#define	fillglue   (filglue + gluespecsize)
	[#162] 0pt plus 1fill minus 0pt. 更多...
#define	ssglue   (fillglue + gluespecsize)
	[#162] 0pt plus 1fil minus 1fil. 更多...
#define	filnegglue   (ssglue + gluespecsize)
	[#162] 0pt plus −1fil minus 0pt. 更多...
#define	lomemstatmax   (filnegglue + gluespecsize - 1)
	[#162] largest statically allocated word in the variable-size mem. 更多...
#define	pageinshead   (MEM_TOP-CHAR_NODE_SIZE+1)
	[#162] list of insertion data for current page. 更多...
#define	contribhead   (pageinshead-CHAR_NODE_SIZE)
	[#162] vlist of items not yet on current page. 更多...
#define	pagehead   (contribhead-CHAR_NODE_SIZE)
	[#162] vlist for current page. 更多...
#define	temphead   (pagehead-CHAR_NODE_SIZE)
	[#162] head of a temporary list of some kind. 更多...
#define	holdhead   (temphead-CHAR_NODE_SIZE)
	[#162] head of a temporary list of another kind. 更多...
#define	adjusthead   (holdhead-CHAR_NODE_SIZE)
	[#162] head of adjustment list returned by hpack. 更多...
#define	active   (adjusthead-CHAR_NODE_SIZE-CHAR_NODE_SIZE)
	[#162] head of active list in line break, needs two words. 更多...
#define	alignhead   (active-CHAR_NODE_SIZE)
	[#162] head of preamble list for alignments. 更多...
#define	endspan   (alignhead-CHAR_NODE_SIZE)
	[#162] tail of spanned-width lists. 更多...
#define	omittemplate   (endspan-CHAR_NODE_SIZE)
	[#162] a constant token list. 更多...
#define	nulllist   (omittemplate-CHAR_NODE_SIZE)
	[#162] permanently empty list. 更多...
#define	ligtrick   (nulllist-CHAR_NODE_SIZE)
	[#162] a ligature masquerading as a char_node. 更多...
#define	garbage   (ligtrick)
	[#162] used for scrap information. 更多...
#define	backuphead   (ligtrick-CHAR_NODE_SIZE)
	[#162] head of token list built by scan_keyword. 更多...
#define	himemstatmin   (backuphead)
	[#162] smallest statically allocated word in the one-word mem. 更多...
#define	himemstatusage   14
	[#162] the number of one-word nodes always present. 更多...

函数
void	check_mem (Boolean printlocs)
	p60#167 更多...
void	search_mem (Pointer p)
	p61#172 更多...
void	mem_init_once ()
	[#164] 更多...
void	mem_var_init ()
	[p59#166] 更多...

变量
UChar	free_cells [(MEM_MAX - MEM_MIN+8)/8]
	[#165] free: free cells, 以 byte(8) 分配，按位取用. 更多...
UChar	was_free [(MEM_MAX - MEM_MIN+8)/8]
	[#165] previously free cells, 以 byte(8) 分配，按位取用. 更多...
Pointer	was_mem_end
	[#165] previous mem_end, lo_mem_max, and hi_mem_min. 更多...
Pointer	was_lo_max
Pointer	was_hi_min
Boolean	panicking
	[#165] do we want to check memory constantly? 更多...

详细描述

宏定义说明

active

#define active   (adjusthead-CHAR_NODE_SIZE-CHAR_NODE_SIZE)

[#162] head of active list in line break, needs two words.

adjusthead

#define adjusthead   (holdhead-CHAR_NODE_SIZE)

[#162] head of adjustment list returned by hpack.

alignhead

#define alignhead   (active-CHAR_NODE_SIZE)

[#162] head of preamble list for alignments.

backuphead

#define backuphead   (ligtrick-CHAR_NODE_SIZE)

[#162] head of token list built by scan_keyword.

contribhead

#define contribhead   (pageinshead-CHAR_NODE_SIZE)

[#162] vlist of items not yet on current page.

endspan

#define endspan   (alignhead-CHAR_NODE_SIZE)

[#162] tail of spanned-width lists.

filglue

#define filglue   (zeroglue + gluespecsize)

[#162] 0pt plus 1fil minus 0pt.

fillglue

#define fillglue   (filglue + gluespecsize)

[#162] 0pt plus 1fill minus 0pt.

filnegglue

#define filnegglue   (ssglue + gluespecsize)

[#162] 0pt plus −1fil minus 0pt.

garbage

#define garbage   (ligtrick)

[#162] used for scrap information.

himemstatmin

#define himemstatmin   (backuphead)

[#162] smallest statically allocated word in the one-word mem.

himemstatusage

#define himemstatusage   14

[#162] the number of one-word nodes always present.

[ori:14] TODO: check 14*CHAR_NODE_SIZE

holdhead

#define holdhead   (temphead-CHAR_NODE_SIZE)

[#162] head of a temporary list of another kind.

ligtrick

#define ligtrick   (nulllist-CHAR_NODE_SIZE)

[#162] a ligature masquerading as a char_node.

lomemstatmax

#define lomemstatmax   (filnegglue + gluespecsize - 1)

[#162] largest statically allocated word in the variable-size mem.

nulllist

#define nulllist   (omittemplate-CHAR_NODE_SIZE)

[#162] permanently empty list.

omittemplate

#define omittemplate   (endspan-CHAR_NODE_SIZE)

[#162] a constant token list.

pagehead

#define pagehead   (contribhead-CHAR_NODE_SIZE)

[#162] vlist for current page.

pageinshead

#define pageinshead   (MEM_TOP-CHAR_NODE_SIZE+1)

[#162] list of insertion data for current page.

ssglue

#define ssglue   (fillglue + gluespecsize)

[#162] 0pt plus 1fil minus 1fil.

temphead

#define temphead   (pagehead-CHAR_NODE_SIZE)

[#162] head of a temporary list of some kind.

zeroglue

#define zeroglue   MEM_BOT

[#162] specification for 0pt plus 0pt minus 0pt.

函数说明

check_mem()

void check_mem

(

Boolean

printlocs

)

p60#167

[#168] Check single-word avail list

[#169] Check variable-size avail list

[#170] Check flags of unavailable nodes

[#171] Print newly busy locations

mem_init_once()

void mem_init_once

(

)

[#164]

#790

#797

#820

p59#164

mem_var_init()

void mem_var_init

(

)

[p59#166]

indicate that everything was previously free.

search_mem()

void search_mem

(

Pointer

p

)

p61#172

[#255] Search eqtb for equivalents equal to p

[#285] Search save stack for equivalents that point to p

[#933] Search hyph list for pointers to p

变量说明

free_cells

UChar free_cells[(MEM_MAX - MEM_MIN+8)/8]

[#165] free: free cells, 以 byte(8) 分配，按位取用.

panicking

Boolean panicking

[#165] do we want to check memory constantly?

was_free

UChar was_free[(MEM_MAX - MEM_MIN+8)/8]

[#165] previously free cells, 以 byte(8) 分配，按位取用.

was_hi_min

Pointer was_hi_min

was_lo_max

Pointer was_lo_max

was_mem_end

Pointer was_mem_end

[#165] previous mem_end, lo_mem_max, and hi_mem_min.