Russian Qt Forum

C++ (Qt)
bool QObject::blockSignals ( bool block )

C++ (Qt)
void * data = malloc(1024 * 1024 * 100); // выделили 100 Mb
data = realloc(data, 1024);  
 

C++ (Qt)
#include <QVector>
 
int main ()
{
	const int count = 100 * (1024 * 1024);
 
	QVector <int> test;
	test.resize(count);
 
	printf("after resize, press enter\n");
	getchar();
 
	test.erase(test.begin(), test.begin() + count - 4);
 
	test.squeeze();
 
	printf("after squeeze, press enter\n");
	getchar();
 
	test.clear();
 
	printf("after clear, press enter\n");
	getchar();
 
	return 0;
}
 

C++ (Qt)
#include <QtGUI>
 
int main ()
{
	const int count = 100 * (1024 * 1024);
 
	for (int i = 0; i < 100; ++i) {
		QVector <int> * test = new QVector <int> ();
		test->resize(count);
		test->erase(test->begin(), test->begin() + count - 4);
		test->squeeze();
 
		printf("after squeeze, press enter\n");
		getchar();
	}	
 
	return 0;
}
 

C++ (Qt)
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
 
#define USE_REALLOC	1
 
void * ReAlloc( void * addr, size_t size )
{
	if (!addr) return malloc(size);
 
#if USE_REALLOC
	return realloc(addr, size);
#else
	void * blk = malloc(size);
	memmove(blk, addr, size);
	free(addr);
	return blk;
#endif
}
 
int main ()
{
	const int count = 10 * (1024 * 1024);
 
	int i;
	for (i = 0; i < 1000; ++i) {
		void * test = malloc(count);
//		void * test = malloc(count - i * 1024);   // можно и так, результат тот же
 
		if (test)
			test = ReAlloc(test, 4);
		if (!test) {
			printf("can't alloc/realloc\n");
			break;
		}	
	}
 
	printf("steps done %d\n", i);
 
	return 0;
}