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Add some more locking and const correctness to completion_entry_t in preparation for supporting better multithreading

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This commit is contained in:
ridiculousfish
2012-02-26 14:32:06 -08:00
parent ad7c5886bc
commit 3553e65089
2 changed files with 94 additions and 48 deletions
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119
complete.cpp
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@@ -158,26 +158,35 @@ typedef struct complete_entry_opt
typedef std::list<complete_entry_opt_t> option_list_t;
class completion_entry_t
{
public:
/** Command string */
wcstring cmd;
/** True if command is a path */
bool cmd_is_path;
/** List of all options */
option_list_t options;
/** String containing all short option characters */
wcstring short_opt_str;
/** List of all options */
option_list_t options;
public:
/** Command string */
const wcstring cmd;
/** True if command is a path */
const bool cmd_is_path;
/** True if no other options than the ones supplied are possible */
bool authoritative;
/** Getters for option list. */
option_list_t &get_options();
const option_list_t &get_options() const;
/** Getter for short_opt_str. */
wcstring &get_short_opt_str();
const wcstring &get_short_opt_str() const;
completion_entry_t(const wcstring &c, bool type, const wcstring &options, bool author) :
short_opt_str(options),
cmd(c),
cmd_is_path(type),
short_opt_str(options),
authoritative(author)
{
}
@@ -186,8 +195,32 @@ class completion_entry_t
/** Linked list of all completion entries */
typedef std::list<completion_entry_t *> completion_entry_list_t;
static completion_entry_list_t completion_entries;
/** The lock that guards the list of completion entries */
static pthread_mutex_t completion_lock = PTHREAD_MUTEX_INITIALIZER;
/** The lock that guards the options list of individual completion entries. If both completion_lock and completion_entry_lock are to be taken, completion_lock must be taken first. */
static pthread_mutex_t completion_entry_lock = PTHREAD_MUTEX_INITIALIZER;
option_list_t &completion_entry_t::get_options() {
ASSERT_IS_LOCKED(completion_entry_lock);
return options;
}
const option_list_t &completion_entry_t::get_options() const {
ASSERT_IS_LOCKED(completion_entry_lock);
return options;
}
wcstring &completion_entry_t::get_short_opt_str() {
ASSERT_IS_LOCKED(completion_entry_lock);
return short_opt_str;
}
const wcstring &completion_entry_t::get_short_opt_str() const {
ASSERT_IS_LOCKED(completion_entry_lock);
return short_opt_str;
}
/** Class representing an attempt to compute completions */
class completer_t {
@@ -360,21 +393,26 @@ void complete_add( const wchar_t *cmd,
{
CHECK( cmd, );
/* Lock the lock that allows us to edit the completion entry list */
scoped_lock lock(completion_lock);
completion_entry_t *c;
c = complete_get_exact_entry( cmd, cmd_is_path );
c->options.push_front(complete_entry_opt_t());
complete_entry_opt_t &opt = c->options.front();
/* Lock the lock that allows us to edit individual completion entries */
scoped_lock lock2(completion_entry_lock);
option_list_t &options = c->get_options();
options.push_front(complete_entry_opt_t());
complete_entry_opt_t &opt = options.front();
if( short_opt != L'\0' )
{
int len = 1 + ((result_mode & NO_COMMON) != 0);
c->short_opt_str.push_back(short_opt);
c->get_short_opt_str().push_back(short_opt);
if( len == 2 )
{
c->short_opt_str.push_back(L':');
c->get_short_opt_str().push_back(L':');
}
}
@@ -397,13 +435,18 @@ void complete_add( const wchar_t *cmd,
static bool complete_remove_entry( completion_entry_t *e, wchar_t short_opt, const wchar_t *long_opt )
{
ASSERT_IS_LOCKED(completion_lock);
ASSERT_IS_LOCKED(completion_entry_lock);
option_list_t &options = e->get_options();
if(( short_opt == 0 ) && (long_opt == 0 ) )
{
e->options.clear();
options.clear();
}
else
{
for (option_list_t::iterator iter = e->options.begin(); iter != e->options.end(); )
/* Lock the lock that allows us to edit individual completion entries */
scoped_lock lock2(completion_entry_lock);
for (option_list_t::iterator iter = options.begin(); iter != options.end(); )
{
complete_entry_opt_t &o = *iter;
if(short_opt==o.short_opt || long_opt == o.long_opt)
@@ -415,19 +458,20 @@ static bool complete_remove_entry( completion_entry_t *e, wchar_t short_opt, con
*/
if( o.short_opt )
{
size_t idx = e->short_opt_str.find(o.short_opt);
wcstring &short_opt_str = e->get_short_opt_str();
size_t idx = short_opt_str.find(o.short_opt);
if (idx != wcstring::npos)
{
/* Consume all colons */
size_t first_non_colon = idx + 1;
while (first_non_colon < e->short_opt_str.size() && e->short_opt_str.at(first_non_colon) == L':')
while (first_non_colon < short_opt_str.size() && short_opt_str.at(first_non_colon) == L':')
first_non_colon++;
e->short_opt_str.erase(idx, first_non_colon - idx);
short_opt_str.erase(idx, first_non_colon - idx);
}
}
/* Destroy this option and go to the next one */
iter = e->options.erase(iter);
iter = options.erase(iter);
}
else
{
@@ -436,7 +480,7 @@ static bool complete_remove_entry( completion_entry_t *e, wchar_t short_opt, con
}
}
}
return e->options.empty();
return options.empty();
}
@@ -568,6 +612,7 @@ int complete_is_valid_option( const wchar_t *str,
if (allow_autoload) complete_load( cmd, false );
scoped_lock lock(completion_lock);
scoped_lock lock2(completion_entry_lock);
for (completion_entry_list_t::iterator iter = completion_entries.begin(); iter != completion_entries.end(); iter++)
{
const completion_entry_t *i = *iter;
@@ -587,11 +632,10 @@ int complete_is_valid_option( const wchar_t *str,
break;
}
const option_list_t &options = i->get_options();
if( is_gnu_opt )
{
for (option_list_t::const_iterator iter = i->options.begin(); iter != i->options.end(); iter++)
for (option_list_t::const_iterator iter = options.begin(); iter != options.end(); iter++)
{
const complete_entry_opt_t &o = *iter;
if( o.old_mode )
@@ -614,7 +658,7 @@ int complete_is_valid_option( const wchar_t *str,
else
{
/* Check for old style options */
for (option_list_t::const_iterator iter = i->options.begin(); iter != i->options.end(); iter++)
for (option_list_t::const_iterator iter = options.begin(); iter != options.end(); iter++)
{
const complete_entry_opt_t &o = *iter;
@@ -638,12 +682,11 @@ int complete_is_valid_option( const wchar_t *str,
for( a = &opt[1]; *a; a++ )
{
//PCA Rewrite this
wchar_t *str_pos = const_cast<wchar_t*>(wcschr(i->short_opt_str.c_str(), *a));
if (str_pos )
const wcstring &short_opt_str = i->get_short_opt_str();
size_t str_idx = short_opt_str.find(*a);
if (str_idx != wcstring::npos )
{
if( *(str_pos +1)==L':' )
if (str_idx + 1 < short_opt_str.size() && short_opt_str.at(str_idx + 1) == L':' )
{
/*
This is a short option with an embedded argument,
@@ -1206,9 +1249,10 @@ bool completer_t::complete_param( const wcstring &scmd_orig, const wcstring &spo
complete_load( cmd, true );
scoped_lock lock(completion_lock);
scoped_lock lock2(completion_entry_lock);
for (completion_entry_list_t::iterator iter = completion_entries.begin(); iter != completion_entries.end(); iter++)
{
completion_entry_t *i = *iter;
const completion_entry_t *i = *iter;
const wcstring &match = i->cmd_is_path ? path : cmd;
if( ( (!wildcard_match( match, i->cmd ) ) ) )
@@ -1216,6 +1260,7 @@ bool completer_t::complete_param( const wcstring &scmd_orig, const wcstring &spo
continue;
}
const option_list_t &options = i->get_options();
use_common=1;
if( use_switches )
{
@@ -1224,7 +1269,7 @@ bool completer_t::complete_param( const wcstring &scmd_orig, const wcstring &spo
{
/* Check if we are entering a combined option and argument
(like --color=auto or -I/usr/include) */
for (option_list_t::const_iterator oiter = i->options.begin(); oiter != i->options.end(); oiter++)
for (option_list_t::const_iterator oiter = options.begin(); oiter != options.end(); oiter++)
{
const complete_entry_opt_t *o = &*oiter;
wchar_t *arg;
@@ -1246,7 +1291,7 @@ bool completer_t::complete_param( const wcstring &scmd_orig, const wcstring &spo
If we are using old style long options, check for them
first
*/
for (option_list_t::const_iterator oiter = i->options.begin(); oiter != i->options.end(); oiter++)
for (option_list_t::const_iterator oiter = options.begin(); oiter != options.end(); oiter++)
{
const complete_entry_opt_t *o = &*oiter;
if( o->old_mode )
@@ -1268,7 +1313,7 @@ bool completer_t::complete_param( const wcstring &scmd_orig, const wcstring &spo
*/
if( !old_style_match )
{
for (option_list_t::const_iterator oiter = i->options.begin(); oiter != i->options.end(); oiter++)
for (option_list_t::const_iterator oiter = options.begin(); oiter != options.end(); oiter++)
{
const complete_entry_opt_t *o = &*oiter;
/*
@@ -1294,7 +1339,7 @@ bool completer_t::complete_param( const wcstring &scmd_orig, const wcstring &spo
if( use_common )
{
for (option_list_t::const_iterator oiter = i->options.begin(); oiter != i->options.end(); oiter++)
for (option_list_t::const_iterator oiter = options.begin(); oiter != options.end(); oiter++)
{
const complete_entry_opt_t *o = &*oiter;
/*
@@ -1318,7 +1363,7 @@ bool completer_t::complete_param( const wcstring &scmd_orig, const wcstring &spo
Check if the short style option matches
*/
if( o->short_opt != L'\0' &&
short_ok( str, o->short_opt, i->short_opt_str ) )
short_ok( str, o->short_opt, i->get_short_opt_str() ) )
{
const wchar_t *desc = o->localized_desc();
wchar_t completion[2];
@@ -1854,10 +1899,12 @@ static void append_switch( wcstring &out,
void complete_print( wcstring &out )
{
scoped_lock locker(completion_lock);
scoped_lock locker2(completion_entry_lock);
for (completion_entry_list_t::const_iterator iter = completion_entries.begin(); iter != completion_entries.end(); iter++)
{
const completion_entry_t *e = *iter;
for (option_list_t::const_iterator oiter = e->options.begin(); oiter != e->options.end(); oiter++)
const option_list_t options = e->get_options();
for (option_list_t::const_iterator oiter = options.begin(); oiter != options.end(); oiter++)
{
const complete_entry_opt_t *o = &*oiter;
const wchar_t *modestr[] =