Add helpers for accessing data in libuv handles

Libuv handles have a single generic pointer for storing user data, this adds
some functions for adding/retrieving pointers to "slots" in the new `HandleData`
structure, which increase flexibility when using shared handles(job streams for
example)
This commit is contained in:
Thiago de Arruda 2014-05-07 17:57:23 -03:00
parent 51ee26fe68
commit 7f00608d57
2 changed files with 117 additions and 0 deletions

70
src/os/uv_helpers.c Normal file
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#include <uv.h>
#include "os/uv_helpers.h"
#include "vim.h"
#include "memory.h"
/// Common structure that will always be assigned to the `data` field of
/// libuv handles. It has fields for many types of pointers, and allow a single
/// handle to contain data from many sources
typedef struct {
WStream *wstream;
RStream *rstream;
Job *job;
} HandleData;
static HandleData *init(uv_handle_t *handle);
RStream *handle_get_rstream(uv_handle_t *handle)
{
RStream *rv = init(handle)->rstream;
assert(rv != NULL);
return rv;
}
void handle_set_rstream(uv_handle_t *handle, RStream *rstream)
{
init(handle)->rstream = rstream;
}
WStream *handle_get_wstream(uv_handle_t *handle)
{
WStream *rv = init(handle)->wstream;
assert(rv != NULL);
return rv;
}
void handle_set_wstream(uv_handle_t *handle, WStream *wstream)
{
HandleData *data = init(handle);
data->wstream = wstream;
}
Job *handle_get_job(uv_handle_t *handle)
{
Job *rv = init(handle)->job;
assert(rv != NULL);
return rv;
}
void handle_set_job(uv_handle_t *handle, Job *job)
{
init(handle)->job = job;
}
static HandleData *init(uv_handle_t *handle)
{
HandleData *rv;
if (handle->data == NULL) {
rv = xmalloc(sizeof(HandleData));
rv->rstream = NULL;
rv->wstream = NULL;
rv->job = NULL;
handle->data = rv;
} else {
rv = handle->data;
}
return rv;
}

47
src/os/uv_helpers.h Normal file
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#ifndef NEOVIM_OS_UV_HELPERS_H
#define NEOVIM_OS_UV_HELPERS_H
#include <uv.h>
#include "os/wstream_defs.h"
#include "os/rstream_defs.h"
#include "os/job_defs.h"
/// Gets the RStream instance associated with a libuv handle
///
/// @param handle libuv handle
/// @return the RStream pointer
RStream *handle_get_rstream(uv_handle_t *handle);
/// Associates a RStream instance with a libuv handle
///
/// @param handle libuv handle
/// @param rstream the RStream pointer
void handle_set_rstream(uv_handle_t *handle, RStream *rstream);
/// Gets the WStream instance associated with a libuv handle
///
/// @param handle libuv handle
/// @return the WStream pointer
WStream *handle_get_wstream(uv_handle_t *handle);
/// Associates a WStream instance with a libuv handle
///
/// @param handle libuv handle
/// @param wstream the WStream pointer
void handle_set_wstream(uv_handle_t *handle, WStream *wstream);
/// Gets the Job instance associated with a libuv handle
///
/// @param handle libuv handle
/// @return the Job pointer
Job *handle_get_job(uv_handle_t *handle);
/// Associates a Job instance with a libuv handle
///
/// @param handle libuv handle
/// @param job the Job pointer
void handle_set_job(uv_handle_t *handle, Job *job);
#endif // NEOVIM_OS_UV_HELPERS_H