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MemoryBarMenu.cpp
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MemoryBarMenu.cpp
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/*
* Copyright 2000, Georges-Edouard Berenger. All rights reserved.
* Distributed under the terms of the MIT License.
*/
#include "MemoryBarMenu.h"
#include "MemoryBarMenuItem.h"
#include "KernelMemoryBarMenuItem.h"
#include "ProcessController.h"
#include <Bitmap.h>
#include <Roster.h>
#include <StringForSize.h>
#include <Window.h>
#include <stdlib.h>
#define EXTRA 10
float gMemoryTextWidth;
MemoryBarMenu::MemoryBarMenu(const char* name, info_pack* infos, system_info& systemInfo)
: BMenu(name),
fFirstShow(true)
{
fTeamCount = systemInfo.used_teams + EXTRA;
SetFlags(Flags() | B_PULSE_NEEDED);
fTeamList = (team_id*)malloc(sizeof (team_id) * fTeamCount);
unsigned int k;
for (k = 0; k < systemInfo.used_teams; k++) {
fTeamList[k] = infos[k].team_info.team;
}
while (k < fTeamCount) {
fTeamList[k++] = -1;
}
char buffer[64];
string_for_size(99999999.9, buffer, sizeof(buffer));
gMemoryTextWidth = 2 * StringWidth(buffer) + 32;
fRecycleCount = EXTRA;
fRecycleList = (MRecycleItem*)malloc(sizeof(MRecycleItem) * fRecycleCount);
SetFont(be_plain_font);
AddItem(new KernelMemoryBarMenuItem(systemInfo));
}
MemoryBarMenu::~MemoryBarMenu()
{
free(fTeamList);
free(fRecycleList);
}
void
MemoryBarMenu::Draw(BRect updateRect)
{
if (fFirstShow) {
Pulse();
fFirstShow = false;
}
BMenu::Draw(updateRect);
}
void
MemoryBarMenu::Pulse()
{
system_info sinfo;
get_system_info(&sinfo);
int64 committedMemory = (int64)sinfo.used_pages * B_PAGE_SIZE / 1024;
int64 cachedMemory = (int64)sinfo.cached_pages * B_PAGE_SIZE / 1024;
Window()->BeginViewTransaction();
// create the list of items to remove, for their team is gone. Update the old teams.
int lastRecycle = 0;
int firstRecycle = 0;
int k;
MemoryBarMenuItem* item;
int total = 0;
for (k = 1; (item = (MemoryBarMenuItem*)ItemAt(k)) != NULL; k++) {
int m = item->UpdateSituation(committedMemory);
if (m < 0) {
if (lastRecycle == fRecycleCount) {
fRecycleCount += EXTRA;
fRecycleList = (MRecycleItem*)realloc(fRecycleList,
sizeof(MRecycleItem) * fRecycleCount);
}
fRecycleList[lastRecycle].index = k;
fRecycleList[lastRecycle++].item = item;
} else {
if (lastRecycle > 0) {
RemoveItems(fRecycleList[0].index, lastRecycle, true);
k -= lastRecycle;
lastRecycle = 0;
}
total += m;
}
}
// Look new teams that have appeared. Create an item for them, or recycle from the list.
int32 cookie = 0;
info_pack infos;
item = NULL;
while (get_next_team_info(&cookie, &infos.team_info) == B_OK) {
unsigned int j = 0;
while (j < fTeamCount && infos.team_info.team != fTeamList[j]) {
j++;
}
if (j == fTeamCount) {
// new team
team_info info;
j = 0;
while (j < fTeamCount && fTeamList[j] != -1) {
if (get_team_info(fTeamList[j], &info) != B_OK)
fTeamList[j] = -1;
else
j++;
}
if (j == fTeamCount) {
fTeamCount += 10;
fTeamList = (team_id*)realloc(fTeamList, sizeof(team_id) * fTeamCount);
}
fTeamList[j] = infos.team_info.team;
if (!get_team_name_and_icon(infos, true)) {
// the team is already gone!
fTeamList[j] = -1;
} else {
if (!item && firstRecycle < lastRecycle)
item = fRecycleList[firstRecycle++].item;
if (item)
item->Reset(infos.team_name, infos.team_info.team, infos.team_icon, true);
else {
AddItem(item = new MemoryBarMenuItem(infos.team_name,
infos.team_info.team, infos.team_icon, true, NULL));
}
int m = item->UpdateSituation(committedMemory);
if (m >= 0) {
total += m;
item = NULL;
} else
fTeamList[j] = -1;
}
}
}
if (item) {
RemoveItem(item);
delete item;
}
// Delete the items that haven't been recycled.
if (firstRecycle < lastRecycle) {
RemoveItems(IndexOf(fRecycleList[firstRecycle].item),
lastRecycle - firstRecycle, true);
}
fLastTotalTime = system_time();
KernelMemoryBarMenuItem *kernelItem;
if ((kernelItem = (KernelMemoryBarMenuItem*)ItemAt(0)) != NULL)
kernelItem->UpdateSituation(committedMemory, cachedMemory);
Window()->EndViewTransaction();
Window()->Flush();
}