margo.h 23.5 KB
Newer Older
1 2 3 4 5 6 7 8 9
/*
 * (C) 2015 The University of Chicago
 * 
 * See COPYRIGHT in top-level directory.
 */

#ifndef __MARGO
#define __MARGO

10 11 12 13
#ifdef __cplusplus
extern "C" {
#endif

14 15 16 17 18 19
/* This is to prevent the user from usin HG_Register_data
 * and HG_Registered_data, which are replaced with
 * margo_register_data and margo_registered_data
 * respecively.
 */

20
#include <mercury.h>
21 22
#include <mercury_types.h>
#include <mercury_bulk.h>
23 24 25
#include <mercury_macros.h>
#include <abt.h>

26 27
#undef MERCURY_REGISTER

28 29
struct margo_instance;
typedef struct margo_instance* margo_instance_id;
30
typedef struct margo_data* margo_data_ptr;
Matthieu Dorier's avatar
Matthieu Dorier committed
31
typedef ABT_eventual margo_request;
32

33
#define MARGO_INSTANCE_NULL ((margo_instance_id)NULL)
Matthieu Dorier's avatar
Matthieu Dorier committed
34
#define MARGO_REQUEST_NULL ABT_EVENTUAL_NULL
Shane Snyder's avatar
Shane Snyder committed
35 36
#define MARGO_CLIENT_MODE 0
#define MARGO_SERVER_MODE 1
37
#define MARGO_DEFAULT_MPLEX_ID 0
Jonathan Jenkins's avatar
Jonathan Jenkins committed
38

Shane Snyder's avatar
Shane Snyder committed
39
#define MARGO_PARAM_PROGRESS_TIMEOUT_UB 1
40

Jonathan Jenkins's avatar
Jonathan Jenkins committed
41 42
/**
 * Initializes margo library.
Shane Snyder's avatar
Shane Snyder committed
43
 * @param [in] addr_str            Mercury host address with port number
Shane Snyder's avatar
Shane Snyder committed
44 45 46
 * @param [in] mode                Mode to run Margo in:
 *                                     - MARGO_CLIENT_MODE
 *                                     - MARGO_SERVER_MODE
Jonathan Jenkins's avatar
Jonathan Jenkins committed
47 48
 * @param [in] use_progress_thread Boolean flag to use a dedicated thread for
 *                                 running Mercury's progress loop. If false,
49
 *                                 it will run in the caller's thread context.
Jonathan Jenkins's avatar
Jonathan Jenkins committed
50 51
 * @param [in] rpc_thread_count    Number of threads to use for running RPC
 *                                 calls. A value of 0 directs Margo to execute
52 53 54 55 56 57
 *                                 RPCs in the caller's thread context.
 *                                 Clients (i.e processes that will *not* 
 *                                 service incoming RPCs) should use a value 
 *                                 of 0. A value of -1 directs Margo to use 
 *                                 the same execution context as that used 
 *                                 for Mercury progress.
Jonathan Jenkins's avatar
Jonathan Jenkins committed
58
 * @returns margo instance id on success, MARGO_INSTANCE_NULL upon error
59 60 61 62 63
 *
 * NOTE: Servers (processes expecting to service incoming RPC requests) must
 * specify non-zero values for use_progress_thread and rpc_thread_count *or*
 * call margo_wait_for_finalize() after margo_init() to relinguish control to 
 * Margo.
Jonathan Jenkins's avatar
Jonathan Jenkins committed
64
 */
Shane Snyder's avatar
Shane Snyder committed
65 66
margo_instance_id margo_init(
    const char *addr_str,
Shane Snyder's avatar
Shane Snyder committed
67
    int mode,
Shane Snyder's avatar
Shane Snyder committed
68 69
    int use_progress_thread,
    int rpc_thread_count);
Jonathan Jenkins's avatar
Jonathan Jenkins committed
70

71
/**
Jonathan Jenkins's avatar
doc fix  
Jonathan Jenkins committed
72
 * Initializes margo library from given argobots and Mercury instances.
Philip Carns's avatar
Philip Carns committed
73 74 75
 * @param [in] progress_pool Argobots pool to drive communication
 * @param [in] handler_pool Argobots pool to service RPC handlers
 * @param [in] hg_context Mercury context
Jonathan Jenkins's avatar
fixupme  
Jonathan Jenkins committed
76
 * @returns margo instance id on success, MARGO_INSTANCE_NULL upon error
77
 */
Shane Snyder's avatar
Shane Snyder committed
78 79 80
margo_instance_id margo_init_pool(
    ABT_pool progress_pool,
    ABT_pool handler_pool,
Jonathan Jenkins's avatar
Jonathan Jenkins committed
81
    hg_context_t *hg_context);
82 83

/**
Philip Carns's avatar
Philip Carns committed
84
 * Shuts down margo library and its underlying abt and mercury resources
Philip Carns's avatar
Philip Carns committed
85
 * @param [in] mid Margo instance
86
 */
87 88
void margo_finalize(
    margo_instance_id mid);
89 90 91 92 93 94 95 96 97 98 99

/**
 * Suspends the caller until some other entity (e.g. an RPC, thread, or
 * signal handler) invokes margo_finalize().
 *
 * NOTE: This informs Margo that the calling thread no longer needs to be 
 * scheduled for execution if it is sharing an Argobots pool with the
 * progress engine.
 *
 * @param [in] mid Margo instance
 */
100 101
void margo_wait_for_finalize(
    margo_instance_id mid);
102

103 104
/** 
 * Registers an RPC with margo
105 106 107 108 109 110 111 112
 *
 * \param [in] mid Margo instance
 * \param [in] func_name unique function name for RPC
 * \param [in] in_proc_cb pointer to input proc callback
 * \param [in] out_proc_cb pointer to output proc callback
 * \param [in] rpc_cb RPC callback
 *
 * \return unique ID associated to the registered function
113
 */
114 115 116 117 118 119
hg_id_t margo_register_name(
    margo_instance_id mid,
    const char *func_name,
    hg_proc_cb_t in_proc_cb,
    hg_proc_cb_t out_proc_cb,
    hg_rpc_cb_t rpc_cb);
120

121 122
/** 
 * Registers an RPC with margo that is associated with a multiplexed service
123 124 125 126 127 128 129 130 131 132
 *
 * \param [in] mid Margo instance
 * \param [in] func_name unique function name for RPC
 * \param [in] in_proc_cb pointer to input proc callback
 * \param [in] out_proc_cb pointer to output proc callback
 * \param [in] rpc_cb RPC callback
 * \param [in] mplex_id multiplexing identifier
 * \param [in] pool Argobots pool the handler will execute in
 *
 * \return unique ID associated to the registered function
133
 */
134 135 136 137 138 139 140 141
hg_id_t margo_register_name_mplex(
    margo_instance_id mid,
    const char *func_name,
    hg_proc_cb_t in_proc_cb,
    hg_proc_cb_t out_proc_cb,
    hg_rpc_cb_t rpc_cb,
    uint32_t mplex_id,
    ABT_pool pool);
142

143
/*
144
 * Indicate whether margo_register_name() has been called for the RPC specified by
145 146
 * func_name.
 *
147 148 149 150
 * \param [in] mid Margo instance
 * \param [in] func_name function name
 * \param [out] id registered RPC ID
 * \param [out] flag pointer to boolean
151 152
 *
 * \return HG_SUCCESS or corresponding HG error code
153
 */
154 155 156 157 158
hg_return_t margo_registered_name(
    margo_instance_id mid,
    const char *func_name,
    hg_id_t *id,
    hg_bool_t *flag);
159

160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186
/**
 * Register and associate user data to registered function.
 * When HG_Finalize() is called free_callback (if defined) is called 
 * to free the registered data.
 *
 * \param [in] mid            Margo instance
 * \param [in] id             registered function ID
 * \param [in] data           pointer to data
 * \param [in] free_callback  pointer to free function
 *
 * \return HG_SUCCESS or corresponding HG error code
 */
hg_return_t margo_register_data(
    margo_instance_id mid,
    hg_id_t id,
    void *data,
    void (*free_callback)(void *));

/**
 * Indicate whether margo_register_data() has been called and return associated
 * data.
 *
 * \param [in] mid        Margo instance 
 * \param [in] id         registered function ID
 *
 * \return Pointer to data or NULL
 */
187 188 189
void* margo_registered_data(
    margo_instance_id mid,
    hg_id_t id);
190 191

/**
192
 * Disable response for a given RPC ID.
193
 *
194 195 196
 * \param [in] mid          Margo instance 
 * \param [in] id           registered function ID
 * \param [in] disable_flag flag to disable (1) or re-enable (0) responses
197 198
 *
 * \return HG_SUCCESS or corresponding HG error code
199
 */
200 201 202 203
hg_return_t margo_registered_disable_response(
    margo_instance_id mid,
    hg_id_t id,
    int disable_flag);
204 205 206

/**
 * Lookup an addr from a peer address/name.
207 208 209 210
 * \param [in] name     lookup name
 * \param [out] addr    return address
 *
 * \return HG_SUCCESS or corresponding HG error code
211 212 213
 */
hg_return_t margo_addr_lookup(
    margo_instance_id mid,
214 215
    const char *name,
    hg_addr_t *addr);
216 217

/**
218
 * Free the given Mercury addr.
219
 *
220 221
 * \param [in] mid  Margo instance 
 * \param [in] addr Mercury address
222 223 224
 *
 * \return HG_SUCCESS or corresponding HG error code
 */
225 226 227
hg_return_t margo_addr_free(
    margo_instance_id mid,
    hg_addr_t addr);
228 229

/**
230
 * Access self address. Address must be freed with margo_addr_free().
231
 *
232 233
 * \param [in] mid  Margo instance 
 * \param [in] addr pointer to abstract Mercury address
234 235 236
 *
 * \return HG_SUCCESS or corresponding HG error code
 */
237 238 239
hg_return_t margo_addr_self(
    margo_instance_id mid,
    hg_addr_t *addr);
240 241

/**
242
 * Duplicate an existing Mercury address. 
243
 *
244 245 246
 * \param [in] mid      Margo instance 
 * \param [in] addr     abstract Mercury address to duplicate
 * \param [in] new_addr pointer to newly allocated abstract Mercury address
247 248 249
 *
 * \return HG_SUCCESS or corresponding HG error code
 */
250 251 252 253
hg_return_t margo_addr_dup(
    margo_instance_id mid,
    hg_addr_t addr,
    hg_addr_t *new_addr);
254 255

/**
256 257 258 259 260
 * Convert a Mercury addr to a string (returned string includes the
 * terminating null byte '\0'). If buf is NULL, the address is not
 * converted and only the required size of the buffer is returned.
 * If the input value passed through buf_size is too small, HG_SIZE_ERROR
 * is returned and the buf_size output is set to the minimum size required.
261
 *
262 263 264 265
 * \param [in] mid          Margo instance 
 * \param [in/out] buf      pointer to destination buffer
 * \param [in/out] buf_size pointer to buffer size
 * \param [in] addr         abstract Mercury address
266 267 268
 *
 * \return HG_SUCCESS or corresponding HG error code
 */
269 270 271 272 273
hg_return_t margo_addr_to_string(
    margo_instance_id mid,
    char *buf,
    hg_size_t *buf_size,
    hg_addr_t addr);
274 275

/**
276 277 278 279
 * Initiate a new Mercury RPC using the specified function ID and the
 * local/remote target defined by addr. The handle created can be used to
 * query input and output, as well as issuing the RPC by calling
 * HG_Forward(). After completion the handle must be freed using HG_Destroy().
280
 *
281 282 283 284
 * \param [in] mid      Margo instance 
 * \param [in] addr     abstract Mercury address of destination
 * \param [in] id       registered function ID
 * \param [out] handle  pointer to HG handle
285 286 287
 *
 * \return HG_SUCCESS or corresponding HG error code
 */
288 289 290 291 292
hg_return_t margo_create(
    margo_instance_id mid,
    hg_addr_t addr,
    hg_id_t id,
    hg_handle_t *handle);
293 294

/**
295
 * Destroy Mercury handle.
296
 *
Shane Snyder's avatar
Shane Snyder committed
297
 * \param [in] handle   Mercury handle
298 299 300
 *
 * \return HG_SUCCESS or corresponding HG error code
 */
301 302
hg_return_t margo_destroy(
    hg_handle_t handle);
303 304

/**
305
 * Increment ref count on a Mercury handle.
306
 *
307
 * \param [in] handle Mercury handle
308 309 310
 *
 * \return HG_SUCCESS or corresponding HG error code
 */
311
#define margo_ref_incr HG_Ref_incr
312 313 314 315

/**
 * Get info from handle.
 *
316
 * \param [in] handle Mercury handle
317 318 319
 *
 * \return Pointer to info or NULL in case of failure
 */
320
#define margo_get_info HG_Get_info
321 322 323

/**
 * Get input from handle (requires registration of input proc to deserialize
324
 * parameters). Input must be freed using margo_free_input().
325
 *
326 327
 * \param [in] handle           Mercury handle
 * \param [in/out] in_struct    pointer to input structure
328 329 330
 *
 * \return HG_SUCCESS or corresponding HG error code
 */
331
#define margo_get_input HG_Get_input
332 333 334 335

/**
 * Free resources allocated when deserializing the input.
 *
336 337
 * \param [in] handle           Mercury handle
 * \param [in/out] in_struct    pointer to input structure
338 339 340
 *
 * \return HG_SUCCESS or corresponding HG error code
 */
341
#define margo_free_input HG_Free_input
342 343 344

/**
 * Get output from handle (requires registration of output proc to deserialize
345
 * parameters). Output must be freed using margo_free_output().
346
 *
347 348
 * \param [in] handle           Mercury handle
 * \param [in/out] out_struct   pointer to output structure
349 350 351
 *
 * \return HG_SUCCESS or corresponding HG error code
 */
352
#define margo_get_output HG_Get_output
353 354 355 356

/**
 * Free resources allocated when deserializing the output.
 *
357 358
 * \param [in] handle           Mercury handle
 * \param [in/out] out_struct   pointer to output structure
359 360 361
 *
 * \return HG_SUCCESS or corresponding HG error code
 */
362
#define margo_free_output HG_Free_output
363

Shane Snyder's avatar
Shane Snyder committed
364 365 366 367 368 369 370 371
/**
 * Set target ID that will receive and process RPC request.
 *
 * \param [in] handle       Mercury handle
 * \param [in] target_id    user-defined target ID
 *
 * \return HG_SUCCESS or corresponding HG error code
 */
372
#define margo_set_target_id HG_Set_target_id
Shane Snyder's avatar
Shane Snyder committed
373

374 375 376 377 378 379 380 381 382 383
/**
 * Forward an RPC request to a remote host
 * @param [in] handle identifier for the RPC to be sent
 * @param [in] in_struct input argument struct for RPC
 * @returns 0 on success, hg_return_t values on error
 */
hg_return_t margo_forward(
    hg_handle_t handle,
    void *in_struct);

Matthieu Dorier's avatar
Matthieu Dorier committed
384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404
/**
 * Forward (without blocking) an RPC request to a remote host
 * @param [in] handle identifier for the RPC to be sent
 * @param [in] in_struct input argument struct for RPC
 * @param [out] req request to wait on using margo_wait
 * @returns 0 on success, hg_return_t values on error
 */
hg_return_t margo_iforward(
    hg_handle_t handle,
    void* in_struct,
    margo_request* req);

/**
 * Wait for an operation initiated by a non-blocking
 * margo function (margo_iforward, margo_irespond, etc.)
 * @param [in] req request to wait on
 * @returns 0 on success, hg_return_t values on error
 */
hg_return_t margo_wait(
    margo_request req);

Matthieu Dorier's avatar
Matthieu Dorier committed
405 406 407 408 409 410 411 412 413 414 415 416 417

/**
 * Test if an operation initiated by a non-blocking
 * margo function (margo_iforward, margo_irespond, etc.)
 * has completed.
 *
 * @param [in] req request created by the non-blocking call
 * @param [out] flag 1 if request is completed, 0 otherwise
 *
 * @return 0 on success, ABT error code otherwise
 */
int margo_test(margo_request req, int* flag);

418 419 420 421 422 423 424 425 426 427 428 429
/**
 * Forward an RPC request to a remote host with a user-defined timeout
 * @param [in] handle identifier for the RPC to be sent
 * @param [in] in_struct input argument struct for RPC
 * @param [in] timeout_ms timeout in milliseconds
 * @returns 0 on success, hg_return_t values on error
 */
hg_return_t margo_forward_timed(
    hg_handle_t handle,
    void *in_struct,
    double timeout_ms);

Jonathan Jenkins's avatar
Jonathan Jenkins committed
430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445
/**
 * Send an RPC response, waiting for completion before returning
 * control to the calling ULT.
 * Note: this call is typically not needed as RPC listeners need not concern
 * themselves with what happens after an RPC finishes. However, there are cases
 * when this is useful (deferring resource cleanup, calling margo_finalize()
 * for e.g. a shutdown RPC).
 * @param [in] handle identifier for the RPC for which a response is being
 * sent
 * @param [in] out_struct output argument struct for response
 * @return HG_SUCCESS on success, hg_return_t values on error. See HG_Respond.
 */
hg_return_t margo_respond(
    hg_handle_t handle,
    void *out_struct);

Matthieu Dorier's avatar
Matthieu Dorier committed
446 447 448 449 450 451 452 453 454 455 456 457 458
/**
 * Send an RPC response without blocking.
 * @param [in] handle identifier for the RPC for which a response is being
 * sent
 * @param [in] out_struct output argument struct for response
 * @param [out] req request on which to wait using margo_wait
 * @return HG_SUCCESS on success, hg_return_t values on error. See HG_Respond.
 */
hg_return_t margo_irespond(
    hg_handle_t handle,
    void *out_struct,
    margo_request* req);

459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499
/**
 * Create an abstract bulk handle from specified memory segments.
 * Memory allocated is then freed when margo_bulk_free() is called.
 * \remark If NULL is passed to buf_ptrs, i.e.,
 * \verbatim margo_bulk_create(mid, count, NULL, buf_sizes, flags, &handle) \endverbatim
 * memory for the missing buf_ptrs array will be internally allocated.
 *
 * \param [in] mid          Margo instance 
 * \param [in] count        number of segments
 * \param [in] buf_ptrs     array of pointers
 * \param [in] buf_sizes    array of sizes
 * \param [in] flags        permission flag:
 *                             - HG_BULK_READWRITE
 *                             - HG_BULK_READ_ONLY
 *                             - HG_BULK_WRITE_ONLY
 * \param [out] handle      pointer to returned abstract bulk handle
 *
 * \return HG_SUCCESS or corresponding HG error code
 */
hg_return_t margo_bulk_create(
    margo_instance_id mid,
    hg_uint32_t count,
    void **buf_ptrs,
    const hg_size_t *buf_sizes,
    hg_uint8_t flags,
    hg_bulk_t *handle);

/**
 * Free bulk handle.
 *
 * \param [in/out] handle   abstract bulk handle
 *
 * \return HG_SUCCESS or corresponding HG error code
 */
hg_return_t margo_bulk_free(
    hg_bulk_t handle);

/**
 * Increment ref count on bulk handle.
 *
 * \param handle [IN]           abstract bulk handle
500 501 502
 *
 * \return HG_SUCCESS or corresponding HG error code
 */
503
#define margo_bulk_ref_incr HG_Bulk_ref_incr
504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520

/**
 * Access bulk handle to retrieve memory segments abstracted by handle.
 *
 * \param [in] handle           abstract bulk handle
 * \param [in] offset           bulk offset
 * \param [in] size             bulk size
 * \param [in] flags            permission flag:
 *                                 - HG_BULK_READWRITE
 *                                 - HG_BULK_READ_ONLY
 * \param [in] max_count        maximum number of segments to be returned
 * \param [in/out] buf_ptrs     array of buffer pointers
 * \param [in/out] buf_sizes    array of buffer sizes
 * \param [out] actual_count    actual number of segments returned
 *
 * \return HG_SUCCESS or corresponding HG error code
 */
521
#define margo_bulk_access HG_Bulk_access
522 523 524 525 526 527 528 529

/**
 * Get total size of data abstracted by bulk handle.
 *
 * \param [in] handle   abstract bulk handle
 *
 * \return Non-negative value
 */
530
#define margo_bulk_get_size HG_Bulk_get_size
531 532 533 534 535 536 537 538

/**
 * Get total number of segments abstracted by bulk handle.
 *
 * \param [in] handle   abstract bulk handle
 *
 * \return Non-negative value
 */
539
#define margo_bulk_get_segment_count HG_Bulk_get_segment_count
540 541 542 543 544 545 546 547 548 549 550

/**
 * Get size required to serialize bulk handle.
 *
 * \param [in] handle           abstract bulk handle
 * \param [in] request_eager    boolean (passing HG_TRUE adds size of encoding
 *                              actual data along the handle if handle meets
 *                              HG_BULK_READ_ONLY flag condition)
 *
 * \return Non-negative value
 */
551
#define margo_bulk_get_serialize_size HG_Bulk_get_serialize_size
552 553 554 555 556 557 558 559 560 561 562 563 564 565

/**
 * Serialize bulk handle into a buffer.
 *
 * \param [in/out] buf          pointer to buffer
 * \param [in] buf_size         buffer size
 * \param [in] request_eager    boolean (passing HG_TRUE encodes actual data
 *                              along the handle, which is more efficient for
 *                              small data, this is only valid if bulk handle
 *                              has HG_BULK_READ_ONLY permission)
 * \param [in] handle           abstract bulk handle
 *
 * \return HG_SUCCESS or corresponding HG error code
 */
566
#define margo_bulk_serialize HG_Bulk_serialize
567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582

/**
 * Deserialize bulk handle from an existing buffer.
 *
 * \param [in] mid      Margo instance 
 * \param [out] handle  abstract bulk handle
 * \param [in] buf      pointer to buffer
 * \param [in] buf_size buffer size
 *
 * \return HG_SUCCESS or corresponding HG error code
 */
hg_return_t margo_bulk_deserialize(
    margo_instance_id mid,
    hg_bulk_t *handle,
    const void *buf,
    hg_size_t buf_size);
583

584 585
/** 
 * Perform a bulk transfer
Philip Carns's avatar
Philip Carns committed
586
 * @param [in] mid Margo instance
587 588 589 590 591 592 593 594 595 596
 * @param [in] op type of operation to perform
 * @param [in] origin_addr remote Mercury address
 * @param [in] origin_handle remote Mercury bulk memory handle
 * @param [in] origin_offset offset into remote bulk memory to access
 * @param [in] local_handle local bulk memory handle
 * @param [in] local_offset offset into local bulk memory to access
 * @param [in] size size (in bytes) of transfer
 * @returns 0 on success, hg_return_t values on error
 */
hg_return_t margo_bulk_transfer(
597
    margo_instance_id mid,
598
    hg_bulk_op_t op,
599
    hg_addr_t origin_addr,
600 601 602 603
    hg_bulk_t origin_handle,
    size_t origin_offset,
    hg_bulk_t local_handle,
    size_t local_offset,
604
    size_t size);
605

Matthieu Dorier's avatar
Matthieu Dorier committed
606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629
/** 
 * Asynchronously performs a bulk transfer
 * @param [in] mid Margo instance
 * @param [in] op type of operation to perform
 * @param [in] origin_addr remote Mercury address
 * @param [in] origin_handle remote Mercury bulk memory handle
 * @param [in] origin_offset offset into remote bulk memory to access
 * @param [in] local_handle local bulk memory handle
 * @param [in] local_offset offset into local bulk memory to access
 * @param [in] size size (in bytes) of transfer
 * @param [out] req request to wait on using margo_wait
 * @returns 0 on success, hg_return_t values on error
 */
hg_return_t margo_bulk_itransfer(
    margo_instance_id mid,
    hg_bulk_op_t op,
    hg_addr_t origin_addr,
    hg_bulk_t origin_handle,
    size_t origin_offset,
    hg_bulk_t local_handle,
    size_t local_offset,
    size_t size,
    margo_request* req);

630 631 632 633 634 635 636 637
/**
 * Suspends the calling ULT for a specified time duration
 * @param [in] mid Margo instance
 * @param [in] timeout_ms timeout duration in milliseconds
 */
void margo_thread_sleep(
    margo_instance_id mid,
    double timeout_ms);
638

639
/**
640 641 642
 * Retrieve the abt_handler pool that was associated with the instance at 
 *    initialization time
 * @param [in] mid Margo instance
643
 */
644
ABT_pool* margo_get_handler_pool(margo_instance_id mid);
645

646
/**
647 648
 * Retrieve the Mercury context that was associated with this instance at
 *    initialization time
649
 * @param [in] mid Margo instance
650
 * @return the Mercury context used in margo_init
651
 */
652
hg_context_t* margo_get_context(margo_instance_id mid);
653

654 655 656
/**
 * Retrieve the Mercury class that was associated with this instance at
 *    initialization time
657
 * @param [in] mid Margo instance
658
 * @return the Mercury class used in margo_init
659
 */
660
hg_class_t* margo_get_class(margo_instance_id mid);
661

662 663 664 665 666 667 668 669 670
/**
 * Get the margo_instance_id from a received RPC handle.
 *
 * \param [in] h          RPC handle
 * 
 * \return Margo instance
 */
margo_instance_id margo_hg_handle_get_instance(hg_handle_t h);

671 672 673 674 675 676 677 678 679
/**
 * Get the margo_instance_id from a received RPC handle.
 *
 * \param [in] info      RPC info structure pointer
 * 
 * \return Margo instance
 */
margo_instance_id margo_hg_info_get_instance(const struct hg_info *info);

Philip Carns's avatar
Philip Carns committed
680 681 682 683 684 685 686 687 688
/**
 * Maps an RPC id and mplex id to the pool that it should execute on
 * @param [in] mid Margo instance
 * @param [in] id Mercury RPC identifier
 * @param [in] mplex_id multiplexing identifier
 * @param [out] pool Argobots pool the handler will execute in
 */
int margo_lookup_mplex(margo_instance_id mid, hg_id_t id, uint32_t mplex_id, ABT_pool *pool);

Philip Carns's avatar
Philip Carns committed
689 690 691 692 693 694 695 696 697 698 699 700 701 702
/**
 * Enables diagnostic collection on specified Margo instance
 *
 * @param [in] mid Margo instance
 * @returns void
 */
void margo_diag_start(margo_instance_id mid);

/**
 * Appends diagnostic statistics (enabled via margo_diag_start()) to specified 
 * output file.
 *
 * @param [in] mid Margo instance
 * @param [in] file output file ("-" for stdout)
703 704
 * @param [in] uniquify flag indicating if file name should have additional
 *   information added to it to make output from different processes unique
Philip Carns's avatar
Philip Carns committed
705 706
 * @returns void
 */
707
void margo_diag_dump(margo_instance_id mid, const char* file, int uniquify);
708

709 710 711 712 713 714 715 716
/**
 * Sets configurable parameters/hints
 *
 * @param [in] mid Margo instance
 * @param [in] option numerical option number
 * @param [out] inout_param used to pass in values
 * @returns void
 */
717
void margo_set_param(margo_instance_id mid, int option, const void *param);
718 719 720 721 722 723 724 725 726

/**
 * Retrieves configurable parameters/hints
 *
 * @param [in] mid Margo instance
 * @param [in] option numerical option number
 * @param [out] param used to pass out values
 * @returns void
 */
727
void margo_get_param(margo_instance_id mid, int option, void *param);
728 729


730 731 732
/**
 * macro that registers a function as an RPC.
 */
733 734 735 736 737 738 739 740 741 742 743 744
#define MARGO_REGISTER(__mid, __func_name, __in_t, __out_t, __handler) \
    margo_register_name(__mid, __func_name, \
        BOOST_PP_CAT(hg_proc_, __in_t), \
        BOOST_PP_CAT(hg_proc_, __out_t), \
        __handler##_handler);

#define MARGO_REGISTER_MPLEX(__mid, __func_name, __in_t, __out_t, __handler, __mplex_id, __pool) \
    margo_register_name_mplex(__mid, __func_name, \
        BOOST_PP_CAT(hg_proc_, __in_t), \
        BOOST_PP_CAT(hg_proc_, __out_t), \
        __handler##_handler, \
        __mplex_id, __pool);
745

746 747
#define NULL_handler NULL

748
/**
Philip Carns's avatar
Philip Carns committed
749
 * macro that defines a function to glue an RPC handler to a ult handler
750 751
 * @param [in] __name name of handler function
 */
752
#define DEFINE_MARGO_RPC_HANDLER(__name) \
753
hg_return_t __name##_handler(hg_handle_t handle) { \
754
    int __ret; \
Philip Carns's avatar
Philip Carns committed
755
    ABT_pool __pool; \
756
    margo_instance_id __mid; \
Shane Snyder's avatar
Shane Snyder committed
757
    const struct hg_info *__hgi; \
758
    __hgi = HG_Get_info(handle); \
759 760 761 762
	__mid = margo_hg_handle_get_instance(handle); \
    if(__mid == MARGO_INSTANCE_NULL) { \
        return(HG_OTHER_ERROR); \
    } \
763
    __ret = margo_lookup_mplex(__mid, __hgi->id, __hgi->target_id, (&__pool)); \
Philip Carns's avatar
Philip Carns committed
764 765 766 767
    if(__ret != 0) { \
        return(HG_INVALID_PARAM); \
    }\
    __ret = ABT_thread_create(__pool, (void (*)(void *))__name, handle, ABT_THREAD_ATTR_NULL, NULL); \
768 769 770 771 772 773
    if(__ret != 0) { \
        return(HG_NOMEM_ERROR); \
    } \
    return(HG_SUCCESS); \
}

Philip Carns's avatar
Philip Carns committed
774 775
/**
 * macro that declares the prototype for a function to glue an RPC 
Philip Carns's avatar
Philip Carns committed
776
 * handler to a ult
Philip Carns's avatar
Philip Carns committed
777 778
 * @param [in] __name name of handler function
 */
779
#define DECLARE_MARGO_RPC_HANDLER(__name) hg_return_t __name##_handler(hg_handle_t handle);
780

781 782 783 784
#ifdef __cplusplus
}
#endif

785
#endif /* __MARGO */