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Add pointer to properties into message structure

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This commit is contained in:
Martin Hurton
2014-04-29 22:30:51 +02:00
parent 26bf74972a
commit 724b2bb844
3 changed files with 24 additions and 11 deletions
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22
src/msg.hpp
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@@ -86,9 +86,12 @@ namespace zmq
private:
class i_properties;
// Size in bytes of the largest message that is still copied around
// rather than being reference-counted.
enum {max_vsm_size = 29};
enum { msg_t_size = 48 };
enum { max_vsm_size = msg_t_size - (8 + sizeof (i_properties *) + 3) };
// Shared message buffer. Message data are either allocated in one
// continuous block along with this structure - thus avoiding one
@@ -120,42 +123,47 @@ namespace zmq
type_cmsg = 104,
type_max = 104
};
// the file descriptor where this message originated, needs to be 64bit due to alignment
int64_t file_desc;
// Note that fields shared between different message types are not
// moved to tha parent class (msg_t). This way we ger tighter packing
// moved to tha parent class (msg_t). This way we get tighter packing
// of the data. Shared fields can be accessed via 'base' member of
// the union.
union {
struct {
unsigned char unused [max_vsm_size + 1];
i_properties *properties;
unsigned char unused [msg_t_size - (8 + sizeof (i_properties *) + 2)];
unsigned char type;
unsigned char flags;
} base;
struct {
i_properties *properties;
unsigned char data [max_vsm_size];
unsigned char size;
unsigned char type;
unsigned char flags;
} vsm;
struct {
i_properties *properties;
content_t *content;
unsigned char unused [max_vsm_size + 1 - sizeof (content_t*)];
unsigned char unused [msg_t_size - (8 + sizeof (i_properties *) + sizeof (content_t*) + 2)];
unsigned char type;
unsigned char flags;
} lmsg;
struct {
i_properties *properties;
void* data;
size_t size;
unsigned char unused
[max_vsm_size + 1 - sizeof (void*) - sizeof (size_t)];
[msg_t_size - (8 + sizeof (i_properties *) + sizeof (void*) + sizeof (size_t) + 2)];
unsigned char type;
unsigned char flags;
} cmsg;
struct {
unsigned char unused [max_vsm_size + 1];
i_properties *properties;
unsigned char unused [msg_t_size - (8 + sizeof (i_properties *) + 2)];
unsigned char type;
unsigned char flags;
} delimiter;