channel.c File Reference

#include "src/core/surface/channel.h"
#include <stdlib.h>
#include <string.h>
#include <grpc/support/alloc.h>
#include <grpc/support/log.h>
#include <grpc/support/string_util.h>
#include "src/core/client_config/resolver_registry.h"
#include "src/core/iomgr/iomgr.h"
#include "src/core/surface/call.h"
#include "src/core/surface/init.h"

Data Structures
struct	registered_call
struct	grpc_channel

Macros
#define	NUM_CACHED_STATUS_ELEMS   3
	Cache grpc-status: X mdelems for X = 0..NUM_CACHED_STATUS_ELEMS. More...
#define	CHANNEL_STACK_FROM_CHANNEL(c)   ((grpc_channel_stack *)((c) + 1))
#define	CHANNEL_FROM_CHANNEL_STACK(channel_stack)   (((grpc_channel *)(channel_stack)) - 1)
#define	CHANNEL_FROM_TOP_ELEM(top_elem)   CHANNEL_FROM_CHANNEL_STACK(grpc_channel_stack_from_top_element(top_elem))
#define	DEFAULT_MAX_MESSAGE_LENGTH   (100 * 1024 * 1024)

Typedefs
typedef struct registered_call	registered_call

Functions
grpc_channel *	grpc_channel_create_from_filters (const char *target, const grpc_channel_filter **filters, size_t num_filters, const grpc_channel_args *args, grpc_mdctx *mdctx, int is_client)
char *	grpc_channel_get_target (grpc_channel *channel)
	Return a newly allocated string representing the target a channel was created for. More...
grpc_call *	grpc_channel_create_call (grpc_channel *channel, grpc_call *parent_call, gpr_uint32 propagation_mask, grpc_completion_queue *cq, const char *method, const char *host, gpr_timespec deadline, void *reserved)
	Create a call given a grpc_channel, in order to call 'method'. More...
void *	grpc_channel_register_call (grpc_channel *channel, const char *method, const char *host, void *reserved)
	Pre-register a method/host pair on a channel. More...
grpc_call *	grpc_channel_create_registered_call (grpc_channel *channel, grpc_call *parent_call, gpr_uint32 propagation_mask, grpc_completion_queue *completion_queue, void *registered_call_handle, gpr_timespec deadline, void *reserved)
	Create a call given a handle returned from grpc_channel_register_call. More...
void	grpc_channel_internal_ref (grpc_channel *c)
void	grpc_channel_internal_unref (grpc_channel *channel)
void	grpc_channel_destroy (grpc_channel *channel)
	Close and destroy a grpc channel. More...
grpc_channel_stack *	grpc_channel_get_channel_stack (grpc_channel *channel)
	Get a (borrowed) pointer to this channels underlying channel stack. More...
grpc_mdctx *	grpc_channel_get_metadata_context (grpc_channel *channel)
	Get a (borrowed) pointer to the channel wide metadata context. More...
grpc_mdstr *	grpc_channel_get_status_string (grpc_channel *channel)
grpc_mdstr *	grpc_channel_get_compression_algorithm_string (grpc_channel *channel)
grpc_mdstr *	grpc_channel_get_encodings_accepted_by_peer_string (grpc_channel *channel)
grpc_mdelem *	grpc_channel_get_reffed_status_elem (grpc_channel *channel, int i)
	Get a grpc_mdelem of grpc-status: X where X is the numeric value of status_code. More...
grpc_mdstr *	grpc_channel_get_message_string (grpc_channel *channel)
gpr_uint32	grpc_channel_get_max_message_length (grpc_channel *channel)

Macro Definition Documentation

#define CHANNEL_FROM_CHANNEL_STACK

(

channel_stack

)

(((grpc_channel *)(channel_stack)) - 1)

#define CHANNEL_FROM_TOP_ELEM

(

top_elem

)

CHANNEL_FROM_CHANNEL_STACK(grpc_channel_stack_from_top_element(top_elem))

#define CHANNEL_STACK_FROM_CHANNEL

(

c

)

((grpc_channel_stack *)((c) + 1))

#define DEFAULT_MAX_MESSAGE_LENGTH   (100 * 1024 * 1024)

#define NUM_CACHED_STATUS_ELEMS   3

Cache grpc-status: X mdelems for X = 0..NUM_CACHED_STATUS_ELEMS.

Avoids needing to take a metadata context lock for sending status if the status code is <= NUM_CACHED_STATUS_ELEMS. Sized to allow the most commonly used codes to fit in (OK, Cancelled, Unknown).

Typedef Documentation

typedef struct registered_call registered_call

Function Documentation

grpc_call* grpc_channel_create_call	(	grpc_channel *	channel,
		grpc_call *	parent_call,
		gpr_uint32	propagation_mask,
		grpc_completion_queue *	completion_queue,
		const char *	method,
		const char *	host,
		gpr_timespec	deadline,
		void *	reserved
	)

Create a call given a grpc_channel, in order to call 'method'.

All completions are sent to 'completion_queue'. 'method' and 'host' need only live through the invocation of this function. If parent_call is non-NULL, it must be a server-side call. It will be used to propagate properties from the server call to this new client call.

grpc_channel* grpc_channel_create_from_filters	(	const char *	target,
		const grpc_channel_filter **	filters,
		size_t	num_filters,
		const grpc_channel_args *	args,
		grpc_mdctx *	mdctx,
		int	is_client
	)

grpc_call* grpc_channel_create_registered_call	(	grpc_channel *	channel,
		grpc_call *	parent_call,
		gpr_uint32	propagation_mask,
		grpc_completion_queue *	completion_queue,
		void *	registered_call_handle,
		gpr_timespec	deadline,
		void *	reserved
	)

Create a call given a handle returned from grpc_channel_register_call.

void grpc_channel_destroy

(

grpc_channel *

channel

)

Close and destroy a grpc channel.

grpc_channel_stack* grpc_channel_get_channel_stack

(

grpc_channel *

channel

)

Get a (borrowed) pointer to this channels underlying channel stack.

grpc_mdstr* grpc_channel_get_compression_algorithm_string

(

grpc_channel *

channel

)

grpc_mdstr* grpc_channel_get_encodings_accepted_by_peer_string

(

grpc_channel *

channel

)

gpr_uint32 grpc_channel_get_max_message_length

(

grpc_channel *

channel

)

grpc_mdstr* grpc_channel_get_message_string

(

grpc_channel *

channel

)

grpc_mdctx* grpc_channel_get_metadata_context

(

grpc_channel *

channel

)

Get a (borrowed) pointer to the channel wide metadata context.

grpc_mdelem* grpc_channel_get_reffed_status_elem	(	grpc_channel *	channel,
		int	status_code
	)

Get a grpc_mdelem of grpc-status: X where X is the numeric value of status_code.

The returned elem is owned by the caller.

grpc_mdstr* grpc_channel_get_status_string

(

grpc_channel *

channel

)

char* grpc_channel_get_target

(

grpc_channel *

channel

)

Return a newly allocated string representing the target a channel was created for.

void grpc_channel_internal_ref

(

grpc_channel *

c

)

void grpc_channel_internal_unref

(

grpc_channel *

channel

)

void* grpc_channel_register_call	(	grpc_channel *	channel,
		const char *	method,
		const char *	host,
		void *	reserved
	)

Pre-register a method/host pair on a channel.