Ejemplo n.º 1
0
/* LUA: __gc and buffer:close()
	Releases the buffer resources
*/
static int buffer_event_gc(lua_State* L) {
	le_bufferevent* ev = buffer_event_get(L, 1);
	if(ev->ev) {
		le_buffer *read, *write;
		bufferevent_free(ev->ev);
		ev->ev = NULL;
		/* Also clear out the associated input/output event_buffers
		 * since they would have already been freed.. */
		lua_getfenv(L, 1);
		lua_rawgeti(L, -1, READ_BUFFER_LOCATION);
		lua_rawgeti(L, -2, WRITE_BUFFER_LOCATION);
		read = event_buffer_check(L, -2);
		write = event_buffer_check(L, -1);
		/* Erase Lua's link to the buffers */
		lua_pushnil(L);
		/* LS: ..., fenv, readBuf, writeBuf, nil */
		lua_rawseti(L, -4, READ_BUFFER_LOCATION);
		lua_pushnil(L);
		lua_rawseti(L, -4, WRITE_BUFFER_LOCATION);
		/* Erase their knowledge of the buffer so that the GC won't try to double-free */
		read->buffer = NULL;
		write->buffer = NULL;
	}
	return 0;
}
Ejemplo n.º 2
0
static irqreturn_t armv7_pmnc_interrupt(int irq, void *arg)
{
	unsigned int cnt, cpu = smp_processor_id(), buftype = EVENT_BUF;
	struct pt_regs * const regs = get_irq_regs();
	u32 flags;

	// Stop irq generation
	armv7_pmnc_write(armv7_pmnc_read() & ~PMNC_E);

	// Get and reset overflow status flags
	flags = armv7_pmnc_reset_interrupt();

	// Counters header
	gator_buffer_write_packed_int(cpu, buftype, MESSAGE_COUNTERS);      // type
	gator_buffer_write_packed_int64(cpu, buftype, gator_get_time());    // time
	
	// Cycle counter
	if (flags & (1 << 31)) {
		int value = armv7_ccnt_read(pmnc_count[CCNT]);                  // overrun
		gator_buffer_write_packed_int(cpu, buftype, 2);                 // length
		gator_buffer_write_packed_int(cpu, buftype, pmnc_key[CCNT]);    // key
		gator_buffer_write_packed_int(cpu, buftype, value);             // value
	}

	// PMNC counters
	for (cnt = CNT0; cnt < CNTMAX; cnt++) {
		 if (flags & (1 << (cnt - CNT0))) {
			int value = armv7_cntn_read(cnt, pmnc_count[cnt]);          // overrun
			gator_buffer_write_packed_int(cpu, buftype, 2);             // length
			gator_buffer_write_packed_int(cpu, buftype, pmnc_key[cnt]); // key
			gator_buffer_write_packed_int(cpu, buftype, value);         // value
		 }
	}

	// End Counters, length of zero
	gator_buffer_write_packed_int(cpu, buftype, 0);

	// Output backtrace
	gator_add_sample(cpu, buftype, regs);

	// Check and commit; commit is set to occur once buffer is 3/4 full
	event_buffer_check(cpu);

	// Allow irq generation
	armv7_pmnc_write(armv7_pmnc_read() | PMNC_E);

	return IRQ_HANDLED;
}