1 // RUN: %libomp-compile-and-run
2 // RUN: %libomp-compile && env KMP_TASKLOOP_MIN_TASKS=1 %libomp-run
3
4 #include <stdio.h>
5 #include <omp.h>
6 #include "omp_my_sleep.h"
7
8 #define N 4
9 #define ST 3
10 #define UB 118
11 #define LB 0
12
13 // globals
14 int counter;
15 int task_count;
16
17 // Compiler-generated code (emulation)
18 typedef struct ident {
19 void* dummy;
20 } ident_t;
21
22 typedef struct shar {
23 int *pcounter;
24 int *pj;
25 int *ptask_count;
26 } *pshareds;
27
28 typedef struct task {
29 pshareds shareds;
30 int(* routine)(int,struct task*);
31 int part_id;
32 unsigned long long lb; // library always uses ULONG
33 unsigned long long ub;
34 int st;
35 int last;
36 int i;
37 int j;
38 int th;
39 } *ptask, kmp_task_t;
40
41 typedef int(* task_entry_t)( int, ptask );
42
43 void
__task_dup_entry(ptask task_dst,ptask task_src,int lastpriv)44 __task_dup_entry(ptask task_dst, ptask task_src, int lastpriv)
45 {
46 // setup lastprivate flag
47 task_dst->last = lastpriv;
48 // could be constructor calls here...
49 }
50
51 // OpenMP RTL interfaces
52 typedef unsigned long long kmp_uint64;
53 typedef long long kmp_int64;
54
55 #ifdef __cplusplus
56 extern "C" {
57 #endif
58 void
59 __kmpc_taskloop_5(ident_t *loc, int gtid, kmp_task_t *task, int if_val,
60 kmp_uint64 *lb, kmp_uint64 *ub, kmp_int64 st,
61 int nogroup, int sched, kmp_int64 grainsize, int modifier,
62 void *task_dup);
63 ptask
64 __kmpc_omp_task_alloc(ident_t *loc, int gtid, int flags,
65 size_t sizeof_kmp_task_t, size_t sizeof_shareds,
66 task_entry_t task_entry);
67 void __kmpc_atomic_fixed4_add(void *id_ref, int gtid, int * lhs, int rhs);
68 int __kmpc_global_thread_num(void *id_ref);
69 #ifdef __cplusplus
70 }
71 #endif
72
73 // User's code
task_entry(int gtid,ptask task)74 int task_entry(int gtid, ptask task)
75 {
76 pshareds pshar = task->shareds;
77 __kmpc_atomic_fixed4_add(NULL, gtid, pshar->ptask_count, 1);
78
79 for (task->i = task->lb; task->i <= (int)task->ub; task->i += task->st) {
80 task->th = omp_get_thread_num();
81 __kmpc_atomic_fixed4_add(NULL,gtid,pshar->pcounter,1);
82 task->j = task->i;
83 }
84 my_sleep( 0.1 ); // sleep 100 ms in order to allow other threads to steal tasks
85 if (task->last) {
86 *(pshar->pj) = task->j; // lastprivate
87 }
88 return 0;
89 }
90
task_loop(int sched_type,int sched_val,int modifier)91 void task_loop(int sched_type, int sched_val, int modifier)
92 {
93 int i, j, gtid = __kmpc_global_thread_num(NULL);
94 ptask task;
95 pshareds psh;
96 omp_set_dynamic(0);
97 counter = 0;
98 task_count = 0;
99 #pragma omp parallel num_threads(N)
100 {
101 #pragma omp master
102 {
103 int gtid = __kmpc_global_thread_num(NULL);
104 task = __kmpc_omp_task_alloc(NULL, gtid, 1, sizeof(struct task),
105 sizeof(struct shar), &task_entry);
106 psh = task->shareds;
107 psh->pcounter = &counter;
108 psh->ptask_count = &task_count;
109 psh->pj = &j;
110 task->lb = LB;
111 task->ub = UB;
112 task->st = ST;
113
114 __kmpc_taskloop_5(
115 NULL, // location
116 gtid, // gtid
117 task, // task structure
118 1, // if clause value
119 &task->lb, // lower bound
120 &task->ub, // upper bound
121 ST, // loop increment
122 0, // 1 if nogroup specified
123 sched_type, // schedule type: 0-none, 1-grainsize, 2-num_tasks
124 sched_val, // schedule value (ignored for type 0)
125 modifier, // strict modifier
126 (void*)&__task_dup_entry // tasks duplication routine
127 );
128 } // end master
129 } // end parallel
130 // check results
131 int tc;
132 if (ST == 1) { // most common case
133 tc = UB - LB + 1;
134 } else if (ST < 0) {
135 tc = (LB - UB) / (-ST) + 1;
136 } else { // ST > 0
137 tc = (UB - LB) / ST + 1;
138 }
139 int count;
140 if (sched_type == 1) {
141 count = (sched_val > tc) ? 1 : (tc + sched_val - 1) / sched_val;
142 } else {
143 count = (sched_val > tc) ? tc : sched_val;
144 }
145 if (j != LB + (tc - 1) * ST) {
146 printf("Error in lastprivate, %d != %d\n", j, LB + (tc - 1) * ST);
147 exit(1);
148 }
149 if (counter != tc) {
150 printf("Error, counter %d != %d\n", counter, tc);
151 exit(1);
152 }
153 if (task_count != count) {
154 printf("Error, task count %d != %d\n", task_count, count);
155 exit(1);
156 }
157 }
158
main(int argc,char * argv[])159 int main(int argc, char *argv[]) {
160 task_loop(1, 6, 1); // create 7 tasks
161 task_loop(2, 6, 1); // create 6 tasks
162 task_loop(1, 50, 1); // create 1 task
163 task_loop(2, 50, 1); // create 40 tasks
164
165 printf("Test passed\n");
166 return 0;
167 }
168