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Silence a few warnings and add multi-get example
Quite a couple of warnings for use of unitialized variables. Add a "double-get" example to test direct modex operations Signed-off-by: Ralph Castain <rhc@pmix.org>
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,145 @@ | ||
| #include <stdio.h> | ||
| #include <pmix.h> | ||
| #include <sched.h> | ||
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| static pmix_proc_t allproc = {}; | ||
| static pmix_proc_t myproc = {}; | ||
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| #define ERR(msg, ...) \ | ||
| do { \ | ||
| time_t tm = time(NULL); \ | ||
| char *stm = ctime(&tm); \ | ||
| stm[strlen(stm)-1] = 0; \ | ||
| fprintf(stderr, "%s ERROR: %s:%d " msg "\n", stm, __FILE__, __LINE__, ## __VA_ARGS__); \ | ||
| exit(1); \ | ||
| } while(0); | ||
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| int pmi_set_string(const char *key, void *data, size_t size) | ||
| { | ||
| int rc; | ||
| pmix_value_t value; | ||
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| PMIX_VALUE_CONSTRUCT(&value); | ||
| value.type = PMIX_BYTE_OBJECT; | ||
| value.data.bo.bytes = data; | ||
| value.data.bo.size = size; | ||
| if (PMIX_SUCCESS != (rc = PMIx_Put(PMIX_GLOBAL, key, &value))) { | ||
| ERR("Client ns %s rank %d: PMIx_Put failed: %d\n", myproc.nspace, myproc.rank, rc); | ||
| } | ||
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| if (PMIX_SUCCESS != (rc = PMIx_Commit())) { | ||
| ERR("Client ns %s rank %d: PMIx_Commit failed: %d\n", myproc.nspace, myproc.rank, rc); | ||
| } | ||
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| /* protect the data */ | ||
| value.data.bo.bytes = NULL; | ||
| value.data.bo.size = 0; | ||
| PMIX_VALUE_DESTRUCT(&value); | ||
| printf("PMIx_Put on %s\n", key); | ||
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| return 0; | ||
| } | ||
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| int pmi_get_string(uint32_t peer_rank, const char *key, void **data_out, size_t *data_size_out) | ||
| { | ||
| int rc; | ||
| pmix_proc_t proc; | ||
| pmix_value_t *pvalue; | ||
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| PMIX_PROC_CONSTRUCT(&proc); | ||
| (void)strncpy(proc.nspace, myproc.nspace, PMIX_MAX_NSLEN); | ||
| proc.rank = peer_rank; | ||
| if (PMIX_SUCCESS != (rc = PMIx_Get(&proc, key, NULL, 0, &pvalue))) { | ||
| ERR("Client ns %s rank %d: PMIx_Get %s: %d\n", myproc.nspace, myproc.rank, key, rc); | ||
| } | ||
| if(pvalue->type != PMIX_BYTE_OBJECT){ | ||
| ERR("Client ns %s rank %d: PMIx_Get %s: got wrong data type\n", myproc.nspace, myproc.rank, key); | ||
| } | ||
| *data_out = pvalue->data.bo.bytes; | ||
| *data_size_out = pvalue->data.bo.size; | ||
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| /* protect the data */ | ||
| pvalue->data.bo.bytes = NULL; | ||
| pvalue->data.bo.size = 0; | ||
| PMIX_VALUE_RELEASE(pvalue); | ||
| PMIX_PROC_DESTRUCT(&proc); | ||
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| printf("PMIx_get %s returned %zi bytes\n", key, data_size_out[0]); | ||
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| return 0; | ||
| } | ||
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| static volatile int fence_active = 0; | ||
| static void fence_status_cb(pmix_status_t status, void *cbdata) | ||
| { | ||
| fence_active = 0; | ||
| } | ||
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| int pmix_exchange(bool flag) | ||
| { | ||
| int rc; | ||
| pmix_info_t info; | ||
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| fence_active = 1; | ||
| PMIX_INFO_CONSTRUCT(&info); | ||
| PMIX_INFO_LOAD(&info, PMIX_COLLECT_DATA, &flag, PMIX_BOOL); | ||
| if (PMIX_SUCCESS != (rc = PMIx_Fence_nb(&allproc, 1, &info, 1, fence_status_cb, NULL))){ | ||
| fprintf(stderr, "Client ns %s rank %d: PMIx_Fence_nb failed: %d\n", myproc.nspace, myproc.rank, rc); | ||
| exit(1); | ||
| } | ||
| PMIX_INFO_DESTRUCT(&info); | ||
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| /* wait for completion */ | ||
| while(fence_active); | ||
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| return 0; | ||
| } | ||
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| int main(int argc, char *argv[]) | ||
| { | ||
| char data[256] = {}; | ||
| char *data_out; | ||
| size_t size_out; | ||
| int rc; | ||
| pmix_value_t *pvalue; | ||
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| if (PMIX_SUCCESS != (rc = PMIx_Init(&myproc, NULL, 0))) { | ||
| ERR("PMIx_Init failed"); | ||
| exit(1); | ||
| } | ||
| if(myproc.rank == 0) printf("PMIx initialized\n"); | ||
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| /* job-related info is found in our nspace, assigned to the | ||
| * wildcard rank as it doesn't relate to a specific rank. Setup | ||
| * a name to retrieve such values */ | ||
| PMIX_PROC_CONSTRUCT(&allproc); | ||
| (void)strncpy(allproc.nspace, myproc.nspace, PMIX_MAX_NSLEN); | ||
| allproc.rank = PMIX_RANK_WILDCARD; | ||
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| /* get the number of procs in our job */ | ||
| if (PMIX_SUCCESS != (rc = PMIx_Get(&allproc, PMIX_JOB_SIZE, NULL, 0, &pvalue))) { | ||
| fprintf(stderr, "Client ns %s rank %d: PMIx_Get job size failed: %d\n", myproc.nspace, myproc.rank, rc); | ||
| exit(1); | ||
| } | ||
| uint32_t nprocs = pvalue->data.uint32; | ||
| PMIX_VALUE_RELEASE(pvalue); | ||
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| /* the below two lines break the subsequent PMIx_Get query on a key set later */ | ||
| pmi_set_string("test-key-1", data, 256); | ||
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| sprintf(data, "rank %d", myproc.rank); | ||
| pmi_set_string("test-key-2", data, 256); | ||
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| /* An explicit Fence has to be called again to read the `test-key-2` */ | ||
| // pmix_exchange(false); | ||
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| pmi_get_string((myproc.rank+1)%2, "test-key-2", (void**)&data_out, &size_out); | ||
| printf("%d: obtained data \"%s\"\n", myproc.rank, data_out); | ||
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| if (PMIX_SUCCESS != (rc = PMIx_Finalize(NULL, 0))) { | ||
| ERR("Client ns %s rank %d:PMIx_Finalize failed: %d\n", myproc.nspace, myproc.rank, rc); | ||
| } | ||
| if(myproc.rank == 0) printf("PMIx finalized\n"); | ||
| } |
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