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#ifndef HALIDE_TRACE_UTILS_H
#define HALIDE_TRACE_UTILS_H
#include "HalideRuntime.h"
#include <cstdio>
#include <cstring>
namespace Halide {
namespace Internal {
void bad_type_error(halide_type_t type);
// Simple conversion. Note: assume that 'value' is aligned properly.
template<typename T>
T value_as(halide_type_t type, const halide_scalar_value_t &value) {
switch (type.code) {
case halide_type_int:
switch (type.bits) {
case 8:
return (T)value.u.i8;
case 16:
return (T)value.u.i16;
case 32:
return (T)value.u.i32;
case 64:
return (T)value.u.i64;
default:
bad_type_error(type);
}
break;
case halide_type_uint:
switch (type.bits) {
case 1:
return (T)value.u.b;
case 8:
return (T)value.u.u8;
case 16:
return (T)value.u.u16;
case 32:
return (T)value.u.u32;
case 64:
return (T)value.u.u64;
default:
bad_type_error(type);
}
break;
case halide_type_float:
switch (type.bits) {
case 32:
return (T)value.u.f32;
case 64:
return (T)value.u.f64;
default:
bad_type_error(type);
}
break;
default:
bad_type_error(type);
}
return (T)0;
}
// A struct representing a single Halide tracing packet.
struct Packet : public halide_trace_packet_t {
// Not all of this will be used, but this
// is the max possible packet size we
// consider here.
uint8_t payload[4096];
int get_coord(int idx) const {
return coordinates()[idx];
}
template<typename T>
T get_value_as(int idx) const {
const uint8_t *val = (const uint8_t *)(value()) + idx * type.bytes();
// 'val' may not be aligned: memcpy it to an aligned local
// so that value_as<>() won't complain under sanitizers.
halide_scalar_value_t aligned_value;
// Only copy the number of bytes in the type: the stream isn't guaranteed
// to be padded to sizeof(halide_scalar_value_t).
memcpy(&aligned_value, val, type.bits / 8);
return value_as<T>(type, aligned_value);
}
// Grab a packet from stdin. Returns false when stdin closes.
bool read_from_stdin();
// Grab a packet from a particular fctl file descriptor. Returns false when end is reached.
bool read_from_filedesc(FILE *fdesc);
private:
// Do a blocking read of some number of bytes from a unistd file descriptor.
bool read(void *d, size_t size, FILE *fdesc);
};
} // namespace Internal
} // namespace Halide
#endif
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